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12-31-11, 08:39 AM
#2201
Your cog is slipping.
Thread Starter
My protype BB came in the mail today and I installed it. I've never installed a crankset before, but it was pretty straightforward. My question is about the spindle/crank arm interface. I have maybe 4-5mm of spindle showing between the crank arm and bottom bracket shell. I can't seem to push the crank arm down the spindle any further. Is this how your 75/protype bb setup looks?
Last edited by Scrodzilla; 12-31-11 at 08:42 AM.
12-31-11, 09:13 AM
#2202
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Also, that's a very common situation with ISO taper spindles, which have a much longer taper section than JIS spindles. Even if an adjustable cup with an external lockring is used, there will be a noticeable gap between the crank arm and the cup / lockring. The installation on my Protype / Sugino 75 looks just like the photo. You should always tighten the crank arm bolts based on torque, and the value I always use is 400 in-lbs (33 ft-lbs) for square taper spindles.
12-31-11, 11:48 AM
#2203
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Is there another reason besides price that most go for the protype bb for 75's; like sealed vs loose ball etc? About to buy a set of Sugino's with the matching BB, and if I can get it for cheaper without causing problems that would be great. I was also looking at these for the crank set, Campagnolo – Centaur BB.
12-31-11, 11:53 AM
#2204
Your cog is slipping.
Thread Starter
I chose the Protype because it's got sealed cartridge bearings and would rather not be bothered with needing to service my bottom bracket.
12-31-11, 01:32 PM
#2209
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12-31-11, 01:58 PM
#2212
Your cog is slipping.
Thread Starter
Stay home and Netflix the original Swedish trilogy. It was better anyway.
12-31-11, 02:12 PM
#2214
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I wish I could afford a CAAD10 at that age.
12-31-11, 02:16 PM
#2216
Fresh Garbage
My little brother is 15, 6' tall, 120 lbs. I try to get him more enthusiastic, maybe interested in racing. His first ride was over 20 miles at around 17/18 mph. He could be a killer climber
Scrod, how do I get a 15 year old really interested in more than just slow party rides? I don't want to force him and give him a bad taste because I pushed him a little too hard.
Scrod, how do I get a 15 year old really interested in more than just slow party rides? I don't want to force him and give him a bad taste because I pushed him a little too hard.
Last edited by hairnet; 12-31-11 at 02:19 PM.
12-31-11, 02:19 PM
#2217
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Scrod, have you ever been a bmxer who fought a skateboarder or vice versa?
12-31-11, 02:34 PM
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12-31-11, 02:45 PM
#2220
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Oh, well congratulations for being able to save that much. If I ever got to that point, I probably would be afraid to spend it 
12-31-11, 02:51 PM
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Stock market is cheating. get a real job and learn the value of a hard days work.
but srsly, thats pretty dope.
but srsly, thats pretty dope.
12-31-11, 02:53 PM
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