samsbike wrote:I intend to use the bike mainly for commuting. My current bike currently has a compact and generally I am on the inner ring only using the outer going downhill. I have a rear 11-25 cassette and tend to use the lower gears more than the lower ones I.e. 11, 12 etc.
Currently committed to a compact as my sti's are doubles.
You need a bigger cassette. Eg I run 12-30 but 105 shifters can go up to 32T.
My other option is to run a triple, which will give me a closer set of ratios. However, what I dont know is whether I can run a 10 speed triple sti on a compact crank, as shimano sell a triple and double version of the lever.
there is a page on the shimano website which explains the different trimming/nudge protocols of the various shifters; this is one of the main variations. In 105 they have in the past done a single shifter for double or triple so it is possible, but I've not personally tried it with 10s Ultegra.
My suspicion is that you may need to tweak the cable mounting on the front mech slightly in some cases to get the trim settings to be in the exact right place, because the cable pull isn't the same between inner and middle as middle to outer, and the trim settings for inner are different to those for middle.
samsbike wrote:My other option is to run a triple, which will give me a closer set of ratios. However, what I dont know is whether I can run a 10 speed triple sti on a compact crank, as shimano sell a triple and double version of the lever.
Does anyone know if I can?
Why would you run a double lever on a triple? Don't understand.
samsbike wrote:My other option is to run a triple, which will give me a closer set of ratios. However, what I dont know is whether I can run a 10 speed triple sti on a compact crank, as shimano sell a triple and double version of the lever.
Does anyone know if I can?
Why would you run a double lever on a triple? Don't understand.
Think he is asking about running a triple lever on a double crankset?
Shimano did offer one of their STI which was supposed to be double or triple compatible but it gave a few problems. They have now gone back to specific double or triple STI.
A man can't have everything.
- Where would he put it all.?.
I am so sorry everyone, I have asked two different questions at two different points.
I think if I go with a triple lever, I will have to get a triple crankset and the same with a double. I just have to understand what I need/ want, and then decide what to go for.
