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Forum: Bicycle Mechanics

Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

  1. Sticky Thread Sticky: Hints and tricks thread (hopefully)

    I thought it would be a good thing to have a thread where people post and discuss little tricks they came up, during the course of their cycling and bike-repair experience. One trick I have: I noticed that, no matter how good the rubber insulation on the battery lid of the cyclecomputer, in the...

    Posted By wroomwroomoops
    10 Pages
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    • Replies: 248
    • Views: 42,523
    01-14-10 11:56 PM Go to last post
  2. Sticky Thread Sticky: sheldonbrown.com shortcuts

    My Website has been growing since December 1995, and has become quite large. As a result, it is sometimes challenging to navigate it. Generally the best place to start is http://sheldonbrown.com/glossary or http://sheldonbrown.com/articles But I have also created a number of shortcut links. ...

    Posted By Sheldon Brown
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    • Replies: 76
    • Views: 30,813
    01-13-10 10:34 PM Go to last post
  3. Sticky Thread Sticky: New Posters - please READ THIS

    Welcome to bikeforums.net Bicycle Mechanics Forum. Here mechanics can discuss issues and riders can pick their brains. If you have a mechanical question about your bicycle, here is the place to ask it. (For older bikes, the Classic and Vintage forum might be another place.) Newcomers are...

    Posted By DMF
    2 Pages
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    • Replies: 47
    • Views: 14,465
    12-09-09 05:49 AM Go to last post
  1. Hubs and such??

    Is there a quick way to tell if you need to pull your hubs apart for any reason?? My wheels turn really true and effortlessly. There is no audible noise, but only a slight vibration when spinning wheels and putting my head up agains the frame. Sorry for such a noob question, i don't want to...

    Posted By rworell
    • Replies: 12
    • Views: 125
    02-09-10 05:56 AM Go to last post
  2. Easiest way to relace old wheel?

    I'm planning on relacing an old wheel one spoke at a time so I don't have to disassemble it at all. Good idea, or not? Or is there a better way? Yes, I'm definitely replacing every spoke and nipple - the wheel is over 20 years old, has lots of miles on it, and the last time I rode it three...

    Posted By achoo
    • Replies: 4
    • Views: 58
    02-09-10 05:44 AM Go to last post
  3. unexpected shifting

    New bike: Ultegra 6700 components - rear derailleur (GS) with 11-28 cassette. On the stand there is no problem, it shifts perfectly. While riding, it's a different story. Although shifting through the rest of the gears is normal, the chain feels and sounds like it wants to shift from 19 to 17...

    Posted By Almost Tokyo
    • Replies: 6
    • Views: 61
    02-09-10 04:11 AM Go to last post
  4. Will this tool help me mount and remove skinny high pressure tires?

    I have 27" X 1 " high pressure tires on my vintage bike, and dread having to change flats or replace tires because of the godawful time I have getting the tires off. I've actually totaled tire levers and tubes in the process. Park sells the TL-11 tool: ...

    Posted By Raleigh71
    • Replies: 10
    • Views: 205
    02-09-10 04:07 AM Go to last post
  5. Polish damaged crank arms

    Hi, do you guys think this kind of damage can be polished out? http://img442.imageshack.us/img442/9132/skada.jpg

    Posted By Kavorka
    • Replies: 7
    • Views: 119
    02-09-10 04:02 AM Go to last post
  6. Old bike upgrade advice needed

    Hello all, I'm planning to upgrade a 25 year old Miyata 610 touring bike. It's in great shape, but I would like to do two things - 2) upgrade from a six speed cassette to 8 or 9, and 2) move from downtube friction to indexed shifting (either brifter or barcons). I've read Sheldon Brown...

    Posted By KeithSR
    • Replies: 6
    • Views: 52
    02-09-10 03:59 AM Go to last post
  7. Help with new bike chain please

    Hi i have just bought a new bike and while i was riding it home i rode of a kerb and the chain came off!? it got wedged between the rear gear sprocket and the lower frame. I managed to fix it but it seems that i cant ride of kerbs it sounds like a low pitched clink. Any help would be great. ...

    Posted By nzbikerdude
    • Replies: 12
    • Views: 84
    02-09-10 03:49 AM Go to last post
  8. Ergo Levers - Compatibility btw 1st and 2nd generation

    Is it possible to fit a 1st gen lever arm to a 2nd gen Ergo body? I need it for the sake of chromed lugs. If it's possible by some discreet machining, I'll buy the spare aluminum levers. Worth the try. http://i11.photobucket.com/albums/a154/RS1800/Lever-Xchange.gif

    Posted By Miura
    • Replies: 1
    • Views: 38
    02-09-10 03:42 AM Go to last post
  9. Bontrager Crankset advice

    hello, i was wondering if anyone could shoot an opinion, experience, advice or any help to help me avoid or lean me towards the purchase of a Bontrager Race Lite Triple Crankset w/ Giga X Pipe external bottom bracket. Or is a Shimano 105 Octalink w/ BB-5500 bottom bracket better? I am...

    Posted By ls0725
    • Replies: 6
    • Views: 74
    02-09-10 02:20 AM Go to last post
  10. Getting sand out of fork

    have an old mtb fork and when i shake it i hear stuff inside. if I shake it a lot sand (I think) comes out of the holes mid tube. anyone know a technique for getting the stuff out besides shaking it for hours? or is it not worth bothering with? super technical question, i know. thanks!

    Posted By Chris Chicago
    • Replies: 5
    • Views: 56
    02-09-10 02:00 AM Go to last post
  11. Why don't cyclists use bar tape on flat bars as well as drop bars?

    I just switched out a drop bar to a flat bar for a commuter-style bike and I still have some newish bar tape left on the drops. I could buy grips for the flat bar, but I guess I could also wrap the bar tape on the ends. It got me to thinking, Why do flat bars use grips and drop bars use tape?...

    Posted By bryroth
    • Replies: 14
    • Views: 310
    02-09-10 01:26 AM Go to last post
  12. Need some experienced help

    Hi all. I am new to doing my own wrenching. I got my hands on an older GT Outpost (1997) that is some serious need of renovation/TLC. I have done about all of the stuff that I know how to do, but I am having some issues with the rear wheel and the freehub and cassette. Here's the deal. The...

    Posted By jdwright56
    • Replies: 14
    • Views: 130
    02-09-10 12:39 AM Go to last post
  13. Sturmey Archer stripdown...

    I've just got my hands on 2 Sturmey Archer FW's, an FM and an S5. The axle seems to spin okay on the FW's/FM, but it is completely stuck on the S5. I was contemplating stripping them down, cleaning them up and replacing anything that might need replacing, but... 1. Is it relatively easy to strip...

    Posted By highlyselassie
    • Replies: 14
    • Views: 295
    02-09-10 12:11 AM Go to last post
  14. 1989 Trek 1200 (2 possible enhancements)

    Hi All I picked up a nice old Trek 1200 Aluminum frame bike. It is in great shape and a fun ride, looks real good too. But this 42/53 crankset is inhuman, my daily commute with this setup was around 1974, riding to Jr. High. It is a Biopace setup, I rode my Fisher Hybrid for 20 years with a...

    Posted By danec99
    • Replies: 3
    • Views: 37
    02-09-10 12:04 AM Go to last post
  15. Tube for 37-622 tire?

    Just got a Cannondale Quick 5 Hybrid. The tire says 37-622 and it uses a Schrader valve. The bike shop I frequent sells Bontrager tubes (http://store.trekbikes.com/jump.jsp?itemID=77&itemType=PRODUCT&path=1,2,442,524&iProductID=77&bShopOnline=1). What I'm wondering is: which tube should I...

    Posted By bikegirrrl
    • Replies: 4
    • Views: 45
    02-08-10 11:20 PM Go to last post
  16. What's the downside of Kevlar lined tires apart from $?

    Yeah as per title. Does it roll less effectively as regular tires? Heavier than the non-Kevlar version? Are there anything better than Kevlar for puncture resistance quality?

    Posted By |3iker
    • Replies: 4
    • Views: 108
    02-08-10 11:12 PM Go to last post
  17. stem top cap stripped?

    Hi, my apologies if this issue has arisen before, but this evening I went to swap the 1-1/8" threadless Thomson stem on my touring bike (Kogswell P/R) with a longer stem, and I wasn't able to remove the top cap, on account of the bolt & top cap moving together as I tried turning counterclockwise...

    Posted By ZiP0082
    • Replies: 1
    • Views: 26
    02-08-10 11:06 PM Go to last post
  18. need help w/ stem pics included

    Ok, so I can not seem to get my stem tight enough so that it doesn't swivel around with a decent amount of pressure, where both surfaces are polished and smooth I can't seem to get enough bite. What say my more knowledgeable elders?

    Posted By robb99
    • Replies: 13
    • Views: 129
    02-08-10 10:59 PM Go to last post
  19. Bike fit questions

    I recently built up a new bike using a Nashbar touring frame and am having some issues with getting the fit right. I'm currently experiencing pain in my lower back during and after rides. My guess is that this is either due to getting a frame that is too small or needing to get a slightly longer...

    Posted By andybaran
    • Replies: 10
    • Views: 152
    02-08-10 10:56 PM Go to last post
  20. Downtube shifters install

    Am I missing some piece that I need to do this? I won this Miyata off ebay that came w/ Shimano600 components, but there definitely seems to be something missing as I can't figure out how to attach these downtube shifters.. These are all the parts I have: http://i26.tinypic.com/25jfm86.jpg ...

    Posted By knucks
    2 Pages
    1 2
    • Replies: 45
    • Views: 998
    02-08-10 10:33 PM Go to last post
  21. Wheel dishing WAY WAY off

    I've had a couple bikes in the recent past that had the craziest problem: The wheels were true in a circular sense but the dishing way way off, like a consistent 10 mm. all the way around. I eventually got them true but it baffled me. These were old bikes and the only explanation I could...

    Posted By Raleigh71
    • Replies: 10
    • Views: 95
    02-08-10 10:20 PM Go to last post
  22. Campy 10sp Cassette availability?

    I'm building a new set of wheels for my Chorus 10sp bike and I'm having a hard time finding 10sp Chorus cassettes. I only see Veloce on eBay, when anything is available. I've seen a few used cassettes, but what's the point? Did Campy stop selling 10sp when they switched to 11? You know, give me...

    Posted By zacster
    • Replies: 7
    • Views: 122
    02-08-10 07:54 PM Go to last post
  23. How to remove front Dork Disk ?

    This is on a MTB. An '09 Fuji Nevada 1.0 to be exact. It's really dirty after 6 months of crap collecting. And I wanna throw it out. I see there are bolts on the big ring that seem to be connected to the Dork Disk and nothing else. All I wanna know is if by removing these bolts my crankset won't...

    Posted By zeo_max
    • Replies: 17
    • Views: 352
    02-08-10 07:42 PM Go to last post
  24. Steering Problem

    I have trouble steering to the left or to the right. It doesn't move in those directions fluidly. In other words, it has a willingness to 'lock-up' in the center position . I ride this bike year-round in Toronto weather. I've only had it for a year and some and it has only had this problem...

    Posted By cervelo48
    • Replies: 2
    • Views: 44
    02-08-10 07:30 PM Go to last post
  25. RD won't shift smoothly from 4th to 3rd smallest cog...

    I'm totally mystified by this: When I shift to the next smaller cog from the 4th smallest cog of my cassette, the chain just hesitates for sometimes as many as 10 revolutions before it shifts. The rest of the cogs shift beautifully up and down with no hesitation whatsoever. Shifting the 3rd...

    Posted By jotaeh
    • Replies: 12
    • Views: 122
    02-08-10 07:29 PM Go to last post
  26. Bent/shifted seatstays

    I was working on my 78 schwinn superior last night and noticed that somehow my seatstays had bent to the right about a quarter inch. The chainstays are fine, but now my brake mount doesn't line up. I'm running it fixed right now, so it's not too big of a deal, but I need to know how to fix it. Is...

    Posted By Tedisdead
    • Replies: 3
    • Views: 55
    02-08-10 07:22 PM Go to last post
  27. Stem riser or highly angled stem?

    I'm tired of my single bike being so much less comfortable than my tandem notwithstanding the relative harshness of the Al single. The tandem handlebars are approximately level with the saddle. I've got a 3" or so drop on the single. Single top tube is a bit longer, but easily compensated by...

    Posted By rdtompki
    • Replies: 4
    • Views: 80
    02-08-10 06:53 PM Go to last post
  28. Kestrel bottom bracket + loctite?

    Hello, first post here. I've searched and can't find an answer to this one. I have an older Kestrel frame that I plan on building up. I have a Phil Wood bottom bracket that I would like to install. The Phil Wood design with an adjustable chainline requires loctite to secure the outer cups (or at...

    Posted By jonsan
    • Replies: 0
    • Views: 28
    02-08-10 06:20 PM Go to last post
  29. Stem riser or highly angled stem?

    I'm tired of my single bike being so much less comfortable than my tandem notwithstanding the relative harshness of the Al single. The tandem handlebars are approximately level with the saddle. I've got a 3" or so drop on the single. Single top tube is a bit longer, but easily compensated by...

    Posted By rdtompki
    • Replies: 0
    • Views: 26
    02-08-10 05:27 PM Go to last post
  30. Nuovo Record RD and 7 speed cassette

    I have a Campy Nuovo Record rear derailleur from the mid-1970's. Recently, my old six-speed cassette stripped and had to be replaced. My mechanic put a narrow seven-speed cassette on it. He also replaced the chain. It all works fine until I have to stand on the pedals, such as going up a steep hill...

    Posted By kenalc
    • Replies: 7
    • Views: 224
    02-08-10 04:36 PM Go to last post
  31. Upgrading 27s to 700s

    Some basic information you may need to consider: 70's Nishiki International 10-speed Right now I have: Rims - Sunrims CR-18 Wheels - Vittoria Zaffiro 27 - 1 1/4 I've put a little over 1000 miles on them both, and want to get some better tires, and have been leaning towards Schwalbe...

    Posted By X'igaa Kaa
    2 Pages
    1 2
    • Replies: 31
    • Views: 323
    02-08-10 04:10 PM Go to last post
  32. Campagnolo Ultra Torque Problem Uncovered?

    Hello All, I hope that this message finds everyone well. To all who have a Campy Ultra Torque crankset/bottom bracket system, you might find this interesting... http://roguemechanic.typepad.com/roguemechanic/2008/09/campagnolo-ul-1.html Let me know what you think and if you have any...

    Posted By RogueMechanic@g
    2 Pages
    1 2
    • Replies: 25
    • Views: 630
    02-08-10 02:35 PM Go to last post
  33. Removing Cassette on Trek 7100

    I have a 2009 Trek 7100. I have a broken spoke on the rear wheel, drive side. Which park tool model # do I need to remove the cassette? Thank you!!

    Posted By newbugdriver
    • Replies: 6
    • Views: 76
    02-08-10 02:14 PM Go to last post
  34. Refacing Head Tube on a Carbon Bike

    I have a Dolan carbon fibre roadbike on which I think the head tube needs refacing (looking at it, the top and bottom of the tube does not appear to be 100% parallel). My question is this: I know that it is fairly common practice to reface head tubes and bottom brackets but is this possible with...

    Posted By speedcheese
    • Replies: 4
    • Views: 72
    02-08-10 02:10 PM Go to last post
  35. Bike case handle repair

    Hi, After recent trip to Tenerife, the handle of my bike case was broken. It might be that two screws that hold one side of the handle unscrewed - I found them inside as good as new - and the handle was hanging on one side. I fixed the handle with a shoe lace. But now I want to fix it correctly....

    Posted By smallet
    • Replies: 1
    • Views: 23
    02-08-10 01:51 PM Go to last post
  36. Wheel axle QR lever - which side?

    In another thread, I noticed a reference to a front wheel being in the fork "the wrong way", as evidenced by the wheel's QR lever being on the "wrong side". In the picture, the lever was in the right end of the axle, looking down from rider's point of view. Didn't want to hijack that thread, but...

    Posted By Juha
    • Replies: 9
    • Views: 164
    02-08-10 01:45 PM Go to last post
  37. What to check when refurbishing bike from outside.

    My wife recently was offered the use of a Norco Scorcher that our nephew had outgrown. It's been sitting outside under partial cover for the better part of 2 years. The chain will have to be replaced, but the tires look to be in ok condition, and the chainrings and cogs look decent enough. I've...

    Posted By Beerslinger
    • Replies: 8
    • Views: 121
    02-08-10 01:29 PM Go to last post
  38. Campagnolo 9 / 10 speed compatibility

    Hi Guys have following parts for my bike Campagnolo Mirage 9 speed ergo shifters 9 speed cassette Looking to fit a mirage rear derailleur, problem is i'm struggling to find a 9 speed derailleur Can a ten speed derailleur be used with 9 speed shifters and 9 speed cassette?

    Posted By pistolpedro
    • Replies: 5
    • Views: 88
    02-08-10 01:11 PM Go to last post
  39. new crank

    I need some help.... I have a Specialized Allez sport triple. I want to switch it over to a double. Specs say square taper 68mm 118. It is a 9 speed. I would like a 105 or better. I am thinking about Ebay for cost reasons. I am totally confused on what to look for???? If I get a crank that is...

    Posted By kevntri
    • Replies: 14
    • Views: 209
    02-08-10 01:09 PM Go to last post
  40. Giant Tcr advanced 2 headset troubles..

    I've had a problem with the bearings in my headset on my giant tcr advanced 2 2009. The original problem was a slight judder between the forks and the frame and a creaking from the bearings. I am looking for a cheap replacement but am unsure which headset to buy. Are there different sizes or can i...

    Posted By Sjefferies
    • Replies: 5
    • Views: 66
    02-08-10 01:00 PM Go to last post
  41. Rebuild of a 1987

    Not sure which forum to post this on, but decided on here. I have a 1987 Schwinn Tempo. Their sport/entry level road bike at the time. Pretty nice lugged steel frame, 105 componets through out. Im thinking of upgrading to modern componets. I am planning on an inspection and cold set of the...

    Posted By woodenidol
    • Replies: 6
    • Views: 108
    02-08-10 12:22 PM Go to last post
  42. velocity twin hollow rims - inner width?

    Anyone know the inner width of these dudes? I looked at their main site but couldn't find it. I've heard good things about them despite the single wall design.

    Posted By Gene2308
    • Replies: 2
    • Views: 29
    02-08-10 12:06 PM Go to last post
  43. Harris cycle "century 12" cluster

    Did some searches and found some older posts that suggest you can use the Century 12 rear cluster from Harris without changing the short cage RD (that's also their claim). But I guess I need some more recent feedback. I've got a 9 spd Trek 2100 with 53/39 chainrings and want to use the Century 12...

    Posted By jwb
    • Replies: 7
    • Views: 109
    02-08-10 11:34 AM Go to last post
  44. 1989 hardrock components to surly frame? Broken Chainstay :(

    So my 20 year-old faithful friend (1989 Hard Rock) finely just wore out. The right chainstay broke at the connection with the dropout. What makes it suck just a little bit worse is that I just bought some nice studded tires for it so I could keep commuting through the winter. I want to replace...

    Posted By z90
    • Replies: 21
    • Views: 289
    02-08-10 11:15 AM Go to last post
  45. Need 14T freewheel

    Anyone know where I can get a 14T single speed freewheel that will fit on a standard freewheel hub? I ordered a 14t bmx freewheel and the diameter of the threaded part is smaller than the threaded mount on the hub. thanks!

    Posted By rustmyrtle
    • Replies: 20
    • Views: 213
    02-08-10 10:11 AM Go to last post
  46. Campy compatible FSA chainrings?

    I have a compact crank that I'd like to install but FSA apparently isn't compatible with Campy. Is there a chainring out there that is compatible with both systems? I'd prefer to just buy chainrings rather than purchase a whole new crank. Thanks.

    Posted By UnsafeAlpine
    • Replies: 1
    • Views: 35
    02-08-10 09:24 AM Go to last post
  47. Chain ring question, is this a bad idea?

    I have a '76 Raleigh Grand Prix and I wanted to remove the large 52 tooth chain ring from the outside and just run the 42 tooth ring. Is it a bad idea to drill out the threaded holes so they will be flush with the crank assembly? here is the 42 tooth with the three holes in question...

    Posted By padair
    • Replies: 7
    • Views: 189
    02-08-10 09:12 AM Go to last post
  48. What are 28-inch and 29-inch tires?

    I grew up among 27" tires on road bikes, and 26" and 24" tires on beginners bikes, tandems, etc. Then I noticed a new size, 700c, that was almost identical to 27" but not quite. Still haven't quite figured out why it was introduced, but it has become very popular as 27" tires slide - more power to...

    Posted By Little-Acorn
    • Replies: 13
    • Views: 184
    02-08-10 09:10 AM Go to last post
  49. I pulled the trigger on a "Ride-Ready Tuneup" for a old steel bike

    since I've unloaded so many old bikes I'm treating myself and having a pro go through one of my last acquisitions last summer. I didn't do a thing to it but I know it needs BB overhaul; headset overhaul; wheel hub maintenance; spoke tension and truing; shift cables and a longer seat post. ...

    Posted By rumrunn6
    3 Pages
    1 2 3
    • Replies: 58
    • Views: 1,131
    02-08-10 08:29 AM Go to last post
  50. Shimano 105 left shifter issue

    Good day, I am riding a 2009 Shimano 105 drive train (double). Yesterday while riding home from work I shifted from my largest to smallest chain ring. In down shifting, the front derailleur dumped the chain. When I shifted back to the largest I discovered that the left release shifted no...

    Posted By trustnoone
    • Replies: 6
    • Views: 112
    02-08-10 07:00 AM Go to last post

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