Specialized Sirrus X 4.0 - Chainring Change
06-11-20, 03:41 PM
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Specialized Sirrus X 4.0 - Chainring Change
Specialized Sirrus X 4.0 - comes stock with a 40T chainring - I would like to go to a 34T.
BB 68mm, 24mm spindle, 45.5mm front chainline.
It seems Specialized is using a "direct mount" chainring with some offset.
It is direct mounted with what looks like a 39-tooth locking ring - I can't find anything on a tool that would unlock that - let alone find a chainring that would fit.
BB 68mm, 24mm spindle, 45.5mm front chainline.
It seems Specialized is using a "direct mount" chainring with some offset.
It is direct mounted with what looks like a 39-tooth locking ring - I can't find anything on a tool that would unlock that - let alone find a chainring that would fit.
06-11-20, 04:52 PM
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Oh you're no fun :>) LOL
I'm even contemplating on just buying a new bike with fatter tires and really low gears - have fun with both.
But...ya...thinking about just doing that...take it to the shop.
Thanks !
I'm even contemplating on just buying a new bike with fatter tires and really low gears - have fun with both.
But...ya...thinking about just doing that...take it to the shop.
Thanks !
09-22-20, 10:57 AM
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Update:
Yes, I replaced the Crank & Cassette with,
SRAM NX Eagle Dub Crankset, 175, 32T - Then replaced the 32T with SRAM Eagle Steel Direct Mount Chainring 34T, 6mm Offset
SRAM Dub English Threaded Bottom Bracket, 68mm/73mm Shell
Sunrace 11-46 10-Speed Cassette
Fit Perfectly and perfect chain line !
Might note that this configuration gives extremely low gearing...works great for me for the steep hills in my area but still gives me top end pedaling at 20mph.
Yes, I replaced the Crank & Cassette with,
SRAM NX Eagle Dub Crankset, 175, 32T - Then replaced the 32T with SRAM Eagle Steel Direct Mount Chainring 34T, 6mm Offset
SRAM Dub English Threaded Bottom Bracket, 68mm/73mm Shell
Sunrace 11-46 10-Speed Cassette
Fit Perfectly and perfect chain line !
Might note that this configuration gives extremely low gearing...works great for me for the steep hills in my area but still gives me top end pedaling at 20mph.
10-22-20, 02:22 PM
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Thanks for this information! Really useful for me, as I am looking to do the same thing.
I cannot seem to find anywhere if a SRAM XD freehub will fit on the rear wheel, I was thinking about mounting a GX 10-52 cassette, but it requires the XD freehub to do so.
I've emailed specialized and been to a few shops with no luck. I'm pretty new to this type of bike so any tips are appreciated
I cannot seem to find anywhere if a SRAM XD freehub will fit on the rear wheel, I was thinking about mounting a GX 10-52 cassette, but it requires the XD freehub to do so.
I've emailed specialized and been to a few shops with no luck. I'm pretty new to this type of bike so any tips are appreciated
Update:
Yes, I replaced the Crank & Cassette with,
SRAM NX Eagle Dub Crankset, 175, 32T - Then replaced the 32T with SRAM Eagle Steel Direct Mount Chainring 34T, 6mm Offset
SRAM Dub English Threaded Bottom Bracket, 68mm/73mm Shell
Sunrace 11-46 10-Speed Cassette
Fit Perfectly and perfect chain line !
Might note that this configuration gives extremely low gearing...works great for me for the steep hills in my area but still gives me top end pedaling at 20mph.
Yes, I replaced the Crank & Cassette with,
SRAM NX Eagle Dub Crankset, 175, 32T - Then replaced the 32T with SRAM Eagle Steel Direct Mount Chainring 34T, 6mm Offset
SRAM Dub English Threaded Bottom Bracket, 68mm/73mm Shell
Sunrace 11-46 10-Speed Cassette
Fit Perfectly and perfect chain line !
Might note that this configuration gives extremely low gearing...works great for me for the steep hills in my area but still gives me top end pedaling at 20mph.
10-22-20, 05:51 PM
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Thanks for this information! Really useful for me, as I am looking to do the same thing.
I cannot seem to find anywhere if a SRAM XD freehub will fit on the rear wheel, I was thinking about mounting a GX 10-52 cassette, but it requires the XD freehub to do so.
I've emailed specialized and been to a few shops with no luck. I'm pretty new to this type of bike so any tips are appreciated
I cannot seem to find anywhere if a SRAM XD freehub will fit on the rear wheel, I was thinking about mounting a GX 10-52 cassette, but it requires the XD freehub to do so.
I've emailed specialized and been to a few shops with no luck. I'm pretty new to this type of bike so any tips are appreciated
I originally looked in to it and gave up. I'm pretty sure it won't fit without a lot of hassle.
Try to find those videos to give you a good idea !
