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Racer Tech Thread

Old 09-08-14, 08:28 PM
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Gah. Got the fancy headset/bb cup remover tool, hammered away.. those damn campy bb30 adapter cups won't budge!

I wonder if the lbs used some kinda epoxy on them at some point..

Park tool site says:

Removal of the Campagnolo adapter cups can be involved.
Is that code for hammer on it as hard as possible until they come out or what??

Maybe my problem is I'm not using a bike stand, just holding the frame between my legs while i hammer on it.

It's a good thing these tools don't have a "do you know wtf you're doing with this?" test before you buy 'em!
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Old 09-08-14, 09:26 PM
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bro you gotta whack some bb cups really hard. Like get mad enough that you think you're going to break the bike and just hammer at it. Either way, you'll get some result!
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Old 09-08-14, 09:39 PM
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That's one reason I like the threaded BB on my Leopard. I don't have to rage on it or feel like I'm going to damage it to get it off. Always been skeered to wail on the Giant's press fit BB.
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Old 09-08-14, 10:55 PM
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Originally Posted by Ygduf
you misunderstand the need for gps. I've never used the mapping function. I like the record of where I was.
Leave a trail of popcorn.
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Old 09-09-14, 04:52 AM
  #430  
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Originally Posted by hack
That's one reason I like the threaded BB on my Leopard. I don't have to rage on it or feel like I'm going to damage it to get it off. Always been skeered to wail on the Giant's press fit BB.
That's one of the reason my Look 585 is a keeper. It still has the original Ultegra BB on it. OTOH, my Allez is on its second BB after 5k miles. I'm seriously considering getting the Praxis unit and a Shimano crankset for the Allez, just to eliminate the BB30 bearings.
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Old 09-09-14, 04:57 AM
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I have two bikes with BB30 and have had zero problems with them once I obtained the proper tools and figured out how to install them correctly. The one thing I don't like about them is that the bearing has very little shielding so it relies on it's seal for protection. The seals aren't great so I end up replacing them more often than external bearings.
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Old 09-09-14, 08:12 AM
  #432  
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One trick I have learned from owning multiple BB30 bikes myself:

Buy the FSA BB30 shields. They have a rubber covering / lip on them that acts like an extra seal, they are better then the regular metal only ones from SRAM.
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Old 09-09-14, 09:17 AM
  #433  
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That will cost me 0.1 watt. Unacceptable.

Seriously I may have a set.
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Old 09-09-14, 02:56 PM
  #434  
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Finally ordered a bike.

SuperSix EVO Carbon Force, Racing Edition - SUPERSIX EVO - ELITE ROAD - ROAD - BIKES - 2015

Went into the shop and they had a 2014 SuperSix EVO 105 they were selling for $1600, and I was tempted to buy that. However I'd want to replace the 105 group for something better, and between ebaying the 105 group, buying a new group, the wait time for parts, and explaining to my wife the reasoning behind it all, it seemed like a huge hassle that wasn't guaranteed to go smooth.

I always do this, whenever I buy something I second guess myself.

I'm not sure what to do with my existing bike. I don't think the frame is safe to sell, but the group is good. I'd like to keep the Easton EA90 Aero's, but I'm not sure if they work for 11 speed.

*Edit - I may get a cheap frame and build something for my nephew, but at 14 he's at that age where he tinkers and breaks stuff.

Last edited by furiousferret; 09-09-14 at 03:06 PM.
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Old 09-09-14, 07:06 PM
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Maybe not a tech question but here is a 41ish Q:

What's it worth?
2011 SuperSix Hi Mod
Ultegra FD RD 9 speed group
Microshift shifters (only thing I could find as a replacement and they work better than the Ultegra)
Powertap rear wheel(Pro+) w/ Kinlin rims & x-ray spokes, Profile Design front (paid about $230)
Rotundo bars
Joule 2.0 head unit
All in very good condition, save for a chain drop mark at the FD on the carbon, but a good amount of miles on everything




*edit* Off to the 41

Last edited by beatlebee; 09-10-14 at 09:03 AM.
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Old 09-09-14, 07:49 PM
  #436  
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I was wondering why Specialized found that shaving one's legs is worth 50-70+ seconds over 40 km when Chester Kyle, very reputable person in the field, found they were worth only a couple seconds. The Specialized findings have been disputed because the only other test done was Kyle's and the numbers are really far off.

Ends up Kyle used a bare plastic leg and then glued hair on it, in a miniature wind tunnel (that affects overall pressures because I think you have to pressurize air to replicate air resistance at full size, or even use fluid instead of air, something like that, plus I would be he didn't use scale hair for the test).

Therefore the protocol seems stronger with Specialized's test. Full size (live person), real air speed, very precise drag measurements.

More details here.
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Old 09-09-14, 09:30 PM
  #437  
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More pounding on the bb30 adapter cups on old frame, no luck. Tried a hair dryer thinking maybe it would melt some epoxy or something, but no. Some kind of vice grip would probably help too..

Anyway I moved on to the new frame, and got the bb30 bearings (and c-clips) out no problemo. I've either got the wrong tool for the old frame bb30 cups, and/or they're stuck/glued on.

Probably just gonna say **** it and buy some Wheels Mfg adapter cups and let the old frame collect dust or trash it or something.
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Old 09-10-14, 07:39 AM
  #438  
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Originally Posted by mattm
More pounding on the bb30 adapter cups on old frame, no luck. Tried a hair dryer thinking maybe it would melt some epoxy or something, but no. Some kind of vice grip would probably help too..

Anyway I moved on to the new frame, and got the bb30 bearings (and c-clips) out no problemo. I've either got the wrong tool for the old frame bb30 cups, and/or they're stuck/glued on.

Probably just gonna say **** it and buy some Wheels Mfg adapter cups and let the old frame collect dust or trash it or something.
Might be green loctite.

Try a can of compressed air turned upside down. You want to make the cups colders, not hotter.
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Old 09-10-14, 09:07 AM
  #439  
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Originally Posted by carpediemracing
I was wondering why Specialized found that shaving one's legs is worth 50-70+ seconds over 40 km when Chester Kyle, very reputable person in the field, found they were worth only a couple seconds. The Specialized findings have been disputed because the only other test done was Kyle's and the numbers are really far off.

Ends up Kyle used a bare plastic leg and then glued hair on it, in a miniature wind tunnel (that affects overall pressures because I think you have to pressurize air to replicate air resistance at full size, or even use fluid instead of air, something like that, plus I would be he didn't use scale hair for the test).

Therefore the protocol seems stronger with Specialized's test. Full size (live person), real air speed, very precise drag measurements.

More details here.

hopefully it is replicated soon by others. I have enjoyed following the studies and would guess that the values are closer to specialized claims than Kyle but like most, I have a heard time wrapping my head around that much of a savings over 40km.
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Old 09-10-14, 09:11 AM
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Originally Posted by thechemist
hopefully it is replicated soon by others. I have enjoyed following the studies and would guess that the values are closer to specialized claims than Kyle but like most, I have a heard time wrapping my head around that much of a savings over 40km.
chris and mark @ specialized really know what is up. i think the point is that they were shocked (i know chris was absolutely shocked). they've tested it on a number of athletes since.

i got an invitation to go test in their tunnel....so if i go maybe i can try this. trying to work out a time that fits with my schedule & family obligations and some construction work they're doing...along with their testing of real athletes. (seriously--the professionals are going in after the world championships.)
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Old 09-10-14, 09:32 AM
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Originally Posted by tetonrider
chris and mark @ specialized really know what is up. i think the point is that they were shocked (i know chris was absolutely shocked). they've tested it on a number of athletes since.

i got an invitation to go test in their tunnel....so if i go maybe i can try this. trying to work out a time that fits with my schedule & family obligations and some construction work they're doing...along with their testing of real athletes. (seriously--the professionals are going in after the world championships.)

sweet opportunity for sure! Keep us posted
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Old 09-10-14, 09:33 AM
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A few years ago there was a post on ST about aerodynamics and an illustration of how the air reacts to a round cable vs one with a aerodynamic tail. The round cable wreaked havoc on the air and the tail was smooth. Considering hair acts the same way its almost like have a bunch of micro brakes. This probably isn't some revelation that I've came up with alone, I just doubt engineers considered how big of an actual impact it made.



I'm curious to see follow up testing as well.
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Old 09-10-14, 09:57 AM
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Originally Posted by thechemist
sweet opportunity for sure! Keep us posted
yeah...the problem is that my kid started school and i've been traveling for racing. my buddy @ specialized invited me, and i made the mistake of telling my wife it would be a little vacation to norcal. turns out they are doing some construction so it will be a bit shorter notice, and that doesn't work so well for my wife and kid. (i'm pretty flexible as i'd drive, but last-minute airfare from here (nowhere) to cali basically doesn't exist at any sane price.)

so.... we haven't yet resolved how i'm going to go. we'll see. i want to go in the fall not the winter. maybe it won't happen or i'll have to wait until spring/summer.

Originally Posted by furiousferret
A few years ago there was a post on ST about aerodynamics and an illustration of how the air reacts to a round cable vs one with a aerodynamic tail. The round cable wreaked havoc on the air and the tail was smooth. Considering hair acts the same way its almost like have a bunch of micro brakes. This probably isn't some revelation that I've came up with alone, I just doubt engineers considered how big of an actual impact it made.



I'm curious to see follow up testing as well.
ever see that old (NASA, i think?) drawing about various shapes and their associated drag? round objects, even if small, can have more drag than much larger aero shapes. it's kind of interesting; stuff like a round cable in the wind costs one more than one might think. no, not huge amounts, but surprisingly large for what it is.

that illustration is from, i think, the 1960s but still holds true.
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Old 09-10-14, 10:35 AM
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4iii announced a new powermeter for $399

4iiii?s Introduces $399 Power Meter, Precision: My First Ride With It | DC Rainmaker

A game changer and a cheaper Stages clone, I'll have to keep my eye on and let others beta test the product when it comes out.
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Old 09-10-14, 10:58 AM
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It's cheaper because you supply the crank arm. They supply the epoxy.
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Old 09-10-14, 11:34 AM
  #446  
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Originally Posted by furiousferret
4iii announced a new powermeter for $399

4iiii?s Introduces $399 Power Meter, Precision: My First Ride With It | DC Rainmaker

A game changer and a cheaper Stages clone, I'll have to keep my eye on and let others beta test the product when it comes out.
That's pretty rad. Obviously the main concern would be it popping off somehow, but besides that the price and weight (10g??) makes this really attractive!
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Old 09-10-14, 12:02 PM
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Removing it destroys it so it is basically a throw away power meter.
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Old 09-10-14, 12:09 PM
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Everytime i get close to pulling the trigger on a powermeter something new comes along. Considering the power2max, but if this new option is $400 less and yields good data, I may just wait a bit longer.
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Old 09-10-14, 12:11 PM
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Originally Posted by shovelhd
Removing it destroys it so it is basically a throw away power meter.
Destroys it?
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Old 09-10-14, 12:33 PM
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Originally Posted by mattm
That's pretty rad. Obviously the main concern would be it popping off somehow, but besides that the price and weight (10g??) makes this really attractive!
Plus the option of a dual-side option for the same price as a Stages power meter is pretty neat and worth thinking about. That said, I'm not sure what my plan is on power meters; if I continue to wait before buying one, it won't be because I'm waiting to see how the 4iiii meter works out, it'll be for financial reasons. If I do finally get one next season, I'll just get a Stages or a PowerTap and, if the cheaper option then turns out to be really good, well... so be it.
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