Chain to tire clearance

What's the minimum chain to tire clearance one should be aiming for on a bike?

On the Moby I'm building I have a pretty large rear tire and with everything spaced properly and aligned I have about 1mm of chain to tire clearance.

I can probably move the wheel forward in the swingarm a bit more without hitting the narrower right side of the swingarm but don't know how much clearance I need to avoid the chain rubbing on the tire.

Thanks for any insight

Re: Chain to tire clearance

if theres any space at all, the tire will not rub.

Re: Chain to tire clearance

You could also space out your sprocket and pulley a mm or a few, it's nbd

Re: Chain to tire clearance

> JBOT Admin Wrote:

> -------------------------------------------------------

> You could also space out your sprocket and pulley a mm or a few, it's

> nbd

Though about that. There's enough room to put a spacer behind the sprocket.

Sometime today I'll see how far forward I can move the wheel without hitting the swingarm.

Pretty frustrating setting up the drive line on a French bike. At least the engine can move laterally on a Moby unlike a Peugeot

Re: Chain to tire clearance

Every engine can move laterally if you're willing to do some chopping

Re: Chain to tire clearance

I was able to move the wheel 1/2" forward and think I have pretty good clearance on both sides of the tire.

Not too bad considering the tire is 3 1/2" wide

...lots of dust on the desert. Everything is always covered in a layer of it

Re: Chain to tire clearance

thats a fat tire.

Re: Chain to tire clearance

> pat splat Wrote:

> -------------------------------------------------------

> thats a fat tire.

Better to traverse the desert ( sands ) . ;)

Re: Chain to tire clearance

I remember this fella who brought me a bike to work on, moby with a 3.5 rear. The chain barely dubbed the whitewall tire and just the nature of the motion between rotating wheel vs horizontal chain left a really crazy zigzag design

Re: Chain to tire clearance

Could always cut that edge of the tire to create more clearance .

It has been done before .

Re: Chain to tire clearance

The other things is that you could put a chain guide on top and tensioner on the bottom, that would stop most any side to side wiggle. Mobys are very fucked when it comes to chain tension and suspension, at least mine is.

More up down travel in the swingarm creates really tight/loose chains sometimes. So the best solution is tensioner at least.

Re: Chain to tire clearance

> P D Wrote:

> -------------------------------------------------------

> Could always cut that edge of the tire to create more clearance .

>

> It has been done before .

I was readi g about people taking a wood plane to the tire while running the engine. Seems a bit drastic.

Re: Chain to tire clearance

I think Peugeot sprockets have more offset than Moby sprockets so I could try one if I run into any problems.

Re: Chain to tire clearance

> Jesse Simonsen Wrote:

> -------------------------------------------------------

> > P D Wrote:

>

> > -------------------------------------------------------

>

> > Could always cut that edge of the tire to create more clearance .

>

> >

>

> > It has been done before .

>

> I was readi g about people taking a wood plane to the tire while running

> the engine. Seems a bit drastic.

No one ever uses that part of the tire . No one .

They might get close , but ...

The tire could be worn to the threads and that part of the tire still like it just came out of the mold .

On some of the big Hondas that had to be done if a big tire was used on a shaft driven bike . (edited)

« Go to Topics — end of thread

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account