So, I got a cross bike for the better half that needs lower gearing (cause it'll do a little CX, and a lot of towing kids around..)
It's got 105 STI shifters, 105 front der (double), road compact cranks, KMC 10sp chain - IE, not a funny shaped Shimano one. (Also got 105 rear mech and 11-32 cassette.) Problem is, 34-32 just isn't a low enough gear so we want the kind of gearing offered by MTB Double cranks on there. Shimano cranks are nice and cheap, so was thinking SLX 10sp 38/24 - 24-32 is much nicer for spinning up a steep hill (especially carrying stuff ..)
So, anyone tried Shimano* MTB cranks on Road shifting?
I'm guessing there's a few things:
Any other suggestions? (Going 1x10 with a 28t Widgit ring on mtb cranks is the last resort..)
* I got a SRAM Rival (Wi-Fli) groupset on my own CX bike and replaced the cranks with some X7 42/28. Rival shifting the wider chainline was fine, but the cable routing was still annoying: My routing is top pull so the cable had to go down to a pulley below the derailleur and come back up to the bottom-pull only Rival front der. So I replaced the front derailleur + pulley with an X9 (can do top-pull) .. apparently SRAM use the same cable pull for road/mtb front derailleurs - it worked great.
It's got 105 STI shifters, 105 front der (double), road compact cranks, KMC 10sp chain - IE, not a funny shaped Shimano one. (Also got 105 rear mech and 11-32 cassette.) Problem is, 34-32 just isn't a low enough gear so we want the kind of gearing offered by MTB Double cranks on there. Shimano cranks are nice and cheap, so was thinking SLX 10sp 38/24 - 24-32 is much nicer for spinning up a steep hill (especially carrying stuff ..)
So, anyone tried Shimano* MTB cranks on Road shifting?
I'm guessing there's a few things:
- ~50mm chainline instead of ~43mm. I am hoping the 105 derailleur will shift outwards the extra few mm to reach the big ring on MTB cranks ..
- The HG-X construction on new Shimano cranks/rings. Will it shift a regular (non-Dyna-sys) 10sp chain without dramas? Should I look at other-brand 10sp MTB cranks (that cost a lot more)?
- The 105 derailleur shifting smaller rings. I'm hoping it's OK cause I hear that Shimano Road front vs MTB front derailleurs are different cable pull .. That would rule out changing to a MTB derailleur.
Any other suggestions? (Going 1x10 with a 28t Widgit ring on mtb cranks is the last resort..)
* I got a SRAM Rival (Wi-Fli) groupset on my own CX bike and replaced the cranks with some X7 42/28. Rival shifting the wider chainline was fine, but the cable routing was still annoying: My routing is top pull so the cable had to go down to a pulley below the derailleur and come back up to the bottom-pull only Rival front der. So I replaced the front derailleur + pulley with an X9 (can do top-pull) .. apparently SRAM use the same cable pull for road/mtb front derailleurs - it worked great.
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