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-   -   Junior gearing for 8 speed campagnolo (https://www.bikeforums.net/33-road-bike-racing/530420-junior-gearing-8-speed-campagnolo.html)

jpbrew814 04-12-09 08:34 PM

Junior gearing for 8 speed campagnolo
 
How can I make this work? The only cassettes I've been able to find online are either 12-23 or 13-26, the latter is currently on my bike. I would try to block out gears, but that would require two gears to go unused in addition to the screw on the derailer being too short to do so.

grolby 04-12-09 08:37 PM

Blocking out gears is your only option here, short of some kind of miracle. If you can't do it with the limit screws on the derailer (which seems hard to believe, but okay), then you'll just have to adjust your indexing so that your shifter is set to the highest gear with the chain on the 2nd highest cog.

queerpunk 04-12-09 08:49 PM

Just put a 48t chainring on your crank.

"48/13 for an expected rollout of 25'7"," according to this: http://www.usacycling.org/forms/rule...DJUSTMENTS.pdf

jpbrew814 04-12-09 08:51 PM

where can I buy one?

queerpunk 04-12-09 08:54 PM

What kind of crank do you have? Different cranks have different "bolt circle diameters," also known as BCD - if you draw a circle around all of the chainring bolts (that attack the chainring to the crank), the diameter of that circle. Campag cranks use 135 bcd, most other road cranks use 130 bcd, old road cranks and current track cranks use 144, compact cranks use 110. Anyway, your local bike shop can get you a chainring, or any one of numerous on line retailers.

jpbrew814 04-12-09 08:56 PM

It's a Campagnolo Athena 53/39 crankset

CrimsonKarter21 04-12-09 09:50 PM

Miche might make one. Check on them.

YMCA 04-13-09 06:12 AM

45x12
Lots of juniors have used that setup.
That way you can use many peoples wheels.

Jynx 04-13-09 06:14 AM

I have heard of juniors grinding down the teeth on the 2 smallest cogs so they would be unusable. Not sure if it is a good idea or legal as I am not too familiar with junior rules.

CrimsonKarter21 04-13-09 07:30 AM


Originally Posted by Jynx (Post 8720212)
I have heard of juniors grinding down the teeth on the 2 smallest cogs so they would be unusable. Not sure if it is a good idea or legal as I am not too familiar with junior rules.

That's a BAAAAAAD idea. For regular competition blocked out gearing is alright, but in national and state competition it's explicitly banned.

zzzwillzzz 04-13-09 09:20 AM

grinding off the teeth would be legal, as that is not a blocked gear. a blocked gear is when you use the derailleur limit screws to block access to gears. they don't want people screwing in their limit screws at the end of a race so that the gears are blocked for the rollout after a race


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