Hi I'm after some help with a bike I'm building right now.
Bike is a brand new moots rsl cx frame I intend to use as a race bike but also multi purpose for road and also off road. I've previously used wide range sram 1x gearing with 48t front wn ring and an 11-36 cassette. I got used to it and loved it's simplicity. Gaps was not an issue nor was ratio.
It was lacking a bit for really steep climbs.
New build I is running di2 9170 shifters and I have an xtr rear di2 mech. This moots will be a 1x setup also.
I've found a few people who have run 10-40 xtr or sram xx 10-42 and xtr di2 mech without issue.
This setup is great for longer more off road but I'm also interested in the new 3t cassettes 9-32t. I could run a smaller front ring and tighter ratio gearing with no real downside other than price......
Question is will a 9t work with Di2 mech / shifting. Forgive me I've always run sram and Shimano is new to me......
I have a set of eastons new cranks so changing from rings for ride is fairly easy. Ideally a 40t or 42t front ring will give me good road gravel gearing and less weight.
Hopefully some one here can help?
Cheers Sam
9-32t cassette with Di2 xtr
Moderator: robbosmans
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Well, 42x9 is only a slightly smaller gear than 53x11. With gravel-appropriate tires, that's a BIGGER gear than 53x11 and typical road tires.
Don't know about you, but I'm not going to be pushing that big of a gear on gravel roads.
42x9 at 100rpm on 700x44s: 38.7mph.
53x11 at 100rpm on 700x25s: 37.8mph.
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Don't know about you, but I'm not going to be pushing that big of a gear on gravel roads.
42x9 at 100rpm on 700x44s: 38.7mph.
53x11 at 100rpm on 700x25s: 37.8mph.
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Thanks yes you are correct. 42 or a 40 and a 9t rear is ideal roadie range. For gravel long rides I'll flip over to to 11-40.
Perhaps a 40 ring from with a 9t will give good rollout and nice tight gears still with a decent climbing gear.
Question was more along lines of knowing if 9t sprocket would have issues shifting with and an xtr di2 rear mech.
Thanks for reply.
Perhaps a 40 ring from with a 9t will give good rollout and nice tight gears still with a decent climbing gear.
Question was more along lines of knowing if 9t sprocket would have issues shifting with and an xtr di2 rear mech.
Thanks for reply.
I can't directly answer your question, but keep in mind that the new 3T cassette uses an XD driver body on the freehub.
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Time VXRS Ulteam (7.16 kg)
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viewtopic.php?f=10&t=120268
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Thanks yep already have one fitted on my tune hubs so it is easy for me. Weight saving should be good.
I have no tried it but there is no reason this shouldn't work. It you're not doing really hardcore gravel you could use a dura ace or ultegra mech. It would potentially shift a bit better over the smaller cassette
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