09-16-2017, 12:13 PM
I picked up a low end Cannondale Hybrid (1999 H300) to get back into cycling and to learn a few things about bike mechanics. The bike is great for fitness, but I've started to tear it apart and refit with some inexpensive upgrades, as that is the stuff I love to do. My latest project has been to replace the BB (110-68 square taper-JIS) and upgrade he crank. The original spec listed the crankset as a C.P.I, but once I pulled it I found it to be a 175mm Shimano FC-M290 and it had been the subject of a recall in the late 1990s, so I'm glad I'm doing this upgrade.
The original crank was a 24/34/42 which I plan to replace with a 30/42/52 FSA Vero crankset. Here is where my problem lies. The new FSA crankset slides in too close to the frame. Upon closer inspection I have come to realize the not all crankset BB shafts are created equal. The original Shimano crankset BB shaft extends beyond the innermost chain ring by about 1/8" inch...an "outie", so to speak. The FSA chainring BB shaft is recessed, an "innie", and therefore slides too close to the frame. So I have learned that cranks come as "innies" and "outies".
Can anyone recommend a reasonable triple crank that will fit my "outie" needs. I'd like the largest ring to be in the neighborhood 48-52 teeth. When I look at pictures of cranks, it is really not possible to determine the BB shaft length on the inside. I'm sure there is a more technical description, I'm just not sure what it is.
Thanks to all who have taken the time to read my lengthy post. Any advice will be greatly appreciated.
Bill
The original crank was a 24/34/42 which I plan to replace with a 30/42/52 FSA Vero crankset. Here is where my problem lies. The new FSA crankset slides in too close to the frame. Upon closer inspection I have come to realize the not all crankset BB shafts are created equal. The original Shimano crankset BB shaft extends beyond the innermost chain ring by about 1/8" inch...an "outie", so to speak. The FSA chainring BB shaft is recessed, an "innie", and therefore slides too close to the frame. So I have learned that cranks come as "innies" and "outies".
Can anyone recommend a reasonable triple crank that will fit my "outie" needs. I'd like the largest ring to be in the neighborhood 48-52 teeth. When I look at pictures of cranks, it is really not possible to determine the BB shaft length on the inside. I'm sure there is a more technical description, I'm just not sure what it is.
Thanks to all who have taken the time to read my lengthy post. Any advice will be greatly appreciated.
Bill