118m bottom bracket with crankset meant for 123mm?
05-24-23, 06:23 AM
#1
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118mm bottom bracket with crankset meant for 123mm?
Hello,
Shimano's FC-TY501-2 46/30T double crankset is meant to be used with a 123mm bottom bracket.
If installed on a 118mm bottom bracket , does it mean it will sit too far outward for the derailleur to do its magic?
Thank you.
Shimano's FC-TY501-2 46/30T double crankset is meant to be used with a 123mm bottom bracket.
If installed on a 118mm bottom bracket , does it mean it will sit too far outward for the derailleur to do its magic?
Thank you.
05-24-23, 06:31 AM
#2
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Opposite. Means it'll sit too far inward for correct chainline and/or inner chainring or crank arm will hit the chainstay. if those things work out the FD may not retract far enough to drop to inner ring or have chain rub on inner ring.
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05-24-23, 12:24 PM
#4
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Hello,
Shimano's FC-TY501-2 46/30T double crankset is meant to be used with a 123mm bottom bracket.
If installed on a 118mm bottom bracket , does it mean it will sit too far outward for the derailleur to do its magic?
Thank you.
Shimano's FC-TY501-2 46/30T double crankset is meant to be used with a 123mm bottom bracket.
If installed on a 118mm bottom bracket , does it mean it will sit too far outward for the derailleur to do its magic?
Thank you.
A 3mm difference in the DS shouldn't cause a problem with the FD. With the stated crankset (48.5mm chainline per Shimano spec on a 123mm BB), the chainline should still be in the 45mm area.
If you have the crankset installed on the 122mm now, you can check of the low limit screw has some loosening possible to move the low position closer to the centerline.
05-24-23, 01:33 PM
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You’re going to have to put it together and measure
This is the bike I ride every day I wouldn’t pull 3mm out because it might hit if flexed.
Here’s my mountain bike, I don’t think there’s 3mm to pull.
This is the bike I ride every day I wouldn’t pull 3mm out because it might hit if flexed.
Here’s my mountain bike, I don’t think there’s 3mm to pull.
05-25-23, 04:23 PM
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MAY hit the chain stay. Some bikes have massive clearance between the crank arm and the chain stay, while others have little room for reduced clearance.
