SORA Chainset

[complience]

My crappy KHS300 flite needs new cranks.. so im gonna change the chainring, what do you guys know of quality of Sora Cranks?


http://www.ribblecycles.co.uk/details.asp?Cat=CHAINSETS&Section=CHAR&M=1&GenCode=SHIMCHAR0800

However theres a choice for the sizing either:

170, 30/42/52 or
175, 30/42/52

I understand the last three numbers are the chainring sizes, but what is the first number? the size of the Bottom Bracket?

 

[shannons dad]

The first number is the length of the crank arm. 170mm or 175mm. A longer crank can give you more leverage when you push on the pedals, but 5mm? It's not going to make that big a difference. The Sora's OK, I had one on my last road bike, but I always noticed they had a bit of flex in the crank arms. The Tiagra chainset is only a couple quid more, but might be a bit more stiff. It depends on how serious you are with your riding. A bit of flex never bothered me personally. Hope that helps.


Bill.