I just swapped out the 30t for a 32t. There’s one spacer on the drive side between the cranny and the BB and one spacer on the BB beaten the BB and frame. That’s the way the bike came. It looks like 2.5mm clearance.
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How close should the chainring be to your frame?
shwndh
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15,468 Posts
Mine appears to be closer than that and it doesn't cause any problems. You are probably fine.
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186 Posts
TLDR - It should be fine.
When I added a Power2Max power meter on my FS bike I wanted to retain the 30T but to do so had to go with a Garbaruk ring which is offset 2 or 3mm inward to allow for chain clearance between the power meter and ring. This put teeth about 2mm away from the chainstay.
What I did was add several wraps of electrical tape to the chainstay (see photo) to act as witness so I could see how close the ring would get to the chainstay in actual riding. Started with about a .4mm gap and rode around the neighborhood. Saw just a slight dust mark on the tape. Took off 2 wraps which made it about a .8mm gap and went out and hit the trails. No marks when I got home. That was about 3000 miles ago and just looked at it over the weekend and all is well.
![Image]()
When I added a Power2Max power meter on my FS bike I wanted to retain the 30T but to do so had to go with a Garbaruk ring which is offset 2 or 3mm inward to allow for chain clearance between the power meter and ring. This put teeth about 2mm away from the chainstay.
What I did was add several wraps of electrical tape to the chainstay (see photo) to act as witness so I could see how close the ring would get to the chainstay in actual riding. Started with about a .4mm gap and rode around the neighborhood. Saw just a slight dust mark on the tape. Took off 2 wraps which made it about a .8mm gap and went out and hit the trails. No marks when I got home. That was about 3000 miles ago and just looked at it over the weekend and all is well.
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11,878 Posts
No space on the cranny while you ride that tranny will make you ride all wanky and come home cranky.Make sure there's adequate space between both your nooks AND your cranny.
=sParty
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962 Posts
Crap, mine is too close.
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7,328 Posts
No space on the cranny while you ride that tranny will make you ride all wanky and come home cranky.
The rule of thumb that I learned is that there should be at least 3mm of clearance between your chainring and chainstay. But, in practice, whether you get any chain rub probably depends on a bunch of factors -- your weight, how much climbing you do standing up, frame stiffness, hard tail or full suspension, etc.
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10,262 Posts
At 165 lbs, I am not a clydesdale, but I do a lot of standing climbing and the titanium is pretty flexy.
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