chain rings compatible
are the 2x10 and 3x10 chain rings interchangeable?
I may want to go 2x10 with a bash guard but I like the 24 t granny on the 3x10
in other words can I use a 24t granny instead of the 26 or 28 that comes on the 2x10
It depends on which crankset you are talking about. I believe the XTR trail double has a different bolt pattern than the race double. If you are just talking about XT and below, I believe the answer is yes.
If you want 2x10 with a bash guard and a 24T granny, just get the triple and replace the big chainring with a bashguard.
2X10 has a different BCD than 3X10 on the XTR Crank. all of the XT cranks (M780 series) have the same BCD
Originally Posted by Dover
2x10 Race is different.
2x10 Trail is the same.
so, I could get a 3x10, pull the big ring add bash guard and change the granny from 22 to 26 or 28?
Yes, but a 26/32 or 28/32 is pretty close gearing. You might want a 36 or larger middle ring to provide a good range.
Originally Posted by dan0
The XTR Trail double is a 26/38 and you can fit a bashguard to it if you want.
The XT double comes in a 26/38 or 28/40. It uses the same bolt pattern as the inner 2 chainrings on the triple, but the spider is different so it may not fit a bash guard. I assume you could put these chainrings on an XT triple crankset and then add a bash guard, but I haven't actually tried this.
SRAM has various 2X chainring options including 22/36, 24/38, 26/39, and 28/42, The 26/39 and 28/42 use an 80/120 BCD. The 22/36 and 24/38 use a 64/104 BCD, essentially the inner 2 chainring positions on the triple spider, and you can fit a bashguard if you want.
For a 29er trail bike, riding slower technical trails, I personally prefer a triple crankset with the big ring replaced with a bashguard. The 32T (Shimano) or 33T (SRAM) middle chainring with an 11-36T cassette allows me to mostly stay in that chainring, like a 1x10 setup, but I have the 24T or 22T granny for the really steep climbs or as a bailout gear if I need it.
thats what I am using now, xcept I have a 21t granny. my problem is my new WFO frame has a bolt on fd and the granny rubs on the cage in all but the 2 lowest (biggest) cogs. I dont really see much to offer for 29ers in the new 2x10 setups as they have too high a gear range
Originally Posted by jabrabu
for our type riding but there seems to not be any options for bolt on fd except in the 10 speed type.
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