Chainring Size w/ Compact Crank, and Wheel Questions
I have recently become the owner of a Ridley Crossbow (yay me), and I am absolutely in love with the machine. I have a few go fast bits that I'd like to install, but I'd like some opinions first.
I have an extra Red compact crank. It's got the 50/34 combo. I was assuming that the Crossbow would have a compact crank and I could simply switch the rings, such is not the case. What is a good ring combo? Can I keep the 34 and swap out the 50, or do I need to ditch both and run the typical 38/46? The cassette is a 12/25.
For wheels it comes with some seemingly bombproof fulcrum racing rims. I have some leftover Real Designs Ultrasphere rims from my Litespeed. They are 20/24 spoke, same as the Fulcrums, and weigh much less too. I have read about some people having problems on the road with the Ultraspheres, and others not. I've got a couple thousand miles on them and they're fine, but I don't want to destroy the wheels during cross (I could sell them for some coin and build up a set of tubulars, rather than make more scrap).
No idea what the courses are like, I'm in Salem, OR and will be racing in the NW (and nationals in Bend)
Crossbow came with a SRAM S300 crank, no markings of chainring size, I'd say 38/46 though.
I threw on my extra Red compact crank and was able to get a 46t outer ring from my LBS. I was hoping for a 42 or 44 since I'm working with a 34 inner ring, but we were unable to find any outer rings with 110bcd that were 42 or 44.
I've only ridden cross once, and it was on a practice course. I've got my first race this Sunday, and I can already see the appeal of a single chainring up front. That said, we'll see how the race goes...