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  1. #1251
    Senior Member shovelhd's Avatar
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    It's not the brakes imposing that constraint, it's your frame. So one option is a new frame.

    If I were you I would go to 24mm tires like GP4000s.

  2. #1252
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    Quote Originally Posted by shovelhd View Post
    It's not the brakes imposing that constraint, it's your frame. So one option is a new frame.

    If I were you I would go to 24mm tires like GP4000s.
    yeah, but i was wondering if different brakes might give me a little more room with the same frame, since that would be a much cheaper solution.

    and they are GP4000s. do those run large?

  3. #1253
    fuggitivo solitario echappist's Avatar
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    Give Duracci or Sram Red brakes a try. Most brakes should clear 25mm, it's 28mm that gets you in trouble

    Actually, i donno about Duracci, but i think they should accommodate large tires. I definitely know that my Sram Rival brakes didn't play well with my tubulars on HED Stingers, though i can't remember if it was a vertical or horizontal clearance issue. Either way, i had to sell those and get Sram Red.

  4. #1254
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    I think the DA brakes didn't open enough. I know guys that filed their brake arms (SRAM and DA) to clear wide tire/rims.

  5. #1255
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    Quote Originally Posted by climber7 View Post
    brake/tire clearance question. just got some HED jets. rims are 23mm wide, and i'm running 25mm tires. i can get the brakes (shimano) wide enough, but when i do, the front tire actually rubs the center of the arm of the front brake (since the arm drops lower as cable tension decreases and the brakes open wider). there's one perfectly adjusted spot where everything works, but there's pretty much zero room for error.

    are there any brakes that have more clearance? again, the issue is vertical tire clearance, not horizontal rim width clearance (although i guess they seem to be related).

    edit: and yes, i realize one solution is just to use 23mm tires.
    I see you have a Jamis, I have one too. I'm having the same problem with 25s on my wheels. Wide enough to fit the rim but now rubbing the top of the tire. Maybe it's a fork thing with Jamis, just need a slight longer fork which would then allow the pads to be postioned further down on the brake.

  6. #1256
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    Quote Originally Posted by Andy STi View Post
    I see you have a Jamis, I have one too. I'm having the same problem with 25s on my wheels. Wide enough to fit the rim but now rubbing the top of the tire. Maybe it's a fork thing with Jamis, just need a slight longer fork which would then allow the pads to be postioned further down on the brake.
    found a solution with the help of the mechanic at my LBS. basically, you need to fiddle with both the adjustment screw on the brake arm and the bolt holding the brakes on the fork. by messing with those two and with the cable tension, i was able to find a position with enough clearance. i had to crank the brake adjustment screw as far as it would go in one direction (can't remember which one) and then twist the brakes in the fork. hope you can get it to work as well.

    in case anyone else is interested, it's a jamis xenith comp with DA 7800 brakes, HED jet 5 (23mm C2 rim), and 25mm conti GP4000S tires.

  7. #1257
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    Yeah, I've fiddled with those 2 adjustment screws. Somehow they adjust the spring tension or something - I'm such a master mechanic! I may try an extra washer to push the brake farther out from the fork which may help too - puts it farther out on the wheel.

  8. #1258
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    not the spring tension bolt...the little screw on top that controls horizontal positioning. if you already did that, then i dunno...that's all i've got.

  9. #1259
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    Question for the 33:

    When sprinting (standing and leaning forward), my rear wheel "lifts" and loses contact with the road, long enough to lose traction/speed.
    Is there a trick/technique to prevent this? (It has happened in the past, but today was much more pronounced, at the worst possible time).

    Thanks.

  10. #1260
    Senior Member shovelhd's Avatar
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    This question has been answered at least a hundred times. The problem is your center of gravity is too far forward and you are not compensating enough pushing with your bars, hence your rear wheel hops. You need to find the right balance on your bike during hard efforts out of the saddle. I find it best to do this by starting with form sprints and working up from there. Put some form sprint work into your schedule 2x/wk. Keep the power down to a reasonable level. Concentrate on body position, keeping yourself stable over the bike, and shifting through the gears. You want to be pedaling in circles with the bike flowing beneath you.
    My 10 speed Shimano sell-off is in the Classifieds-For Sale section.

  11. #1261
    Making a kilometer blurry waterrockets's Avatar
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    Yep.

    Another contributing factor could be that your stroke is inefficiently continuing to push when your pedal is at the bottom of the stroke. Since the pedal can't go down any more, your hips go up, and the inertia of this little jump carries your bike with it. Form sprints will fix this as well.

  12. #1262
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    I just saw Taylor Phinney on my lunch ride.

    He waved.
    ...

  13. #1263
    Packfodding 3 caloso's Avatar
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    What a Fred.
    Cyclists of the world, unite! You have nothing to lube but your chains!

  14. #1264
    soon to be gsteinc... rkwaki's Avatar
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    Quote Originally Posted by valygrl View Post
    I just saw Taylor Phinney on my lunch ride.

    He waved.
    Who is Taylor Phinney?
    "if you ride it the way it's meant to be ridden there's no way any wife is less of a ***** than a bicycle." - gstein

  15. #1265
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    will an fsa mega exo bottom bracket work with a DA 7800 crankset?

  16. #1266
    fuggitivo solitario echappist's Avatar
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    depends. FSA has quite a few different standards, and some are shimano (24mm on both sides) compatible.

    though seriously, you just got yourself a Duracci SRM. get a bb that's worthy of a high-end PM. A new BB7900 is about $30, i think

  17. #1267
    Senior Member rankin116's Avatar
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    This feels like an appropriate place for this question. I need a new stem, is there much of a difference between stems besides weight? What should I be looking for?

  18. #1268
    Travelling hopefully chasm54's Avatar
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    Quote Originally Posted by rankin116 View Post
    This feels like an appropriate place for this question. I need a new stem, is there much of a difference between stems besides weight? What should I be looking for?
    You should be looking for something that is the right length and attaches the bars to the steerer. That's about it.
    There have been many days when I haven't felt like riding, but there has never been a day when I was sorry I rode.

  19. #1269
    Senior Member Homebrew01's Avatar
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    ^^ And the correct angle for your fit.
    Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike

  20. #1270
    Senior Member rankin116's Avatar
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    Yeah, I know the length and angle that I want. I guess just wondering if some new, wonderful stem technology has been developed that I'm not aware of.

  21. #1271
    Senior Member Homebrew01's Avatar
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    ^^ Other than the ones with the secret hidden battery to power the secret hidden motor, not any functional difference.
    Last edited by Homebrew01; 07-28-13 at 10:30 AM.
    Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike

  22. #1272
    Packfodding 3 caloso's Avatar
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    Anybody wearing the Specialized Evade helmet? My team switched to a Specialized shop this year and we're supposed to get a pretty good deal on helmets. There's been a healthy debate on the team message board on the Evade v. Prevail.

    Personally, I think the Evade looks ugly and hot. Anyone have personal experience with it?
    Cyclists of the world, unite! You have nothing to lube but your chains!

  23. #1273
    RacingBear UmneyDurak's Avatar
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    It is ugly.
    I see hills.... Bring them on!!!
    Stay calm and bring a towel.

  24. #1274
    Senior Member SpeshulEd's Avatar
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    I think the back looks silly on them. Of course, I just got an air attack and now I look like a power ranger.
    Hey guys, lets go play bikes!

    Strava

  25. #1275
    Making a kilometer blurry waterrockets's Avatar
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    I recently bought a new helmet, and I pretty much always get whatever feels nice that costs ~$50. The guy working the floor at this particular LBS was very nice and helpful. I didn't need much help, but he didn't know that. As I tried on a $45 helmet, he told me that all of the helmets pass the same safety tests, then asked what I was using it for. "Racing."

    "Why are you buying such a cheap helmet?"

    "Why shouldn't I?"

    "How much do you spend on shoes?"

    "Umm, $300?" (well, that's retail value anyway)

    "Why would you spend 6x as much covering your feet as you do protecting your head?"

    "Didn't you just tell me that all the helmets pass the same tests?"

    <crickets>

    "On a 3 hour ride, my feet have been uncomfortable in $50 shoes. My head has not been uncomfortable in a $50 helmet. I'll take this one."

    Nice try though.

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