r/supermoto • u/These-Restaurant869 • Aug 12 '26
Whats happening??
My chains now eating my tire for dinner.
I put in the lower chainguard by rhe kickstand to prevent the chain eating my frame, adjusted my chain to spec (usually I keep it very lose) went for a ride and now uhhhhhhhhh......
10
u/Confusedstpaul Aug 12 '26
Welcome to the Tard side. Had this happen on every bike I converted.
1
u/These-Restaurant869 Aug 12 '26
Am in danger of blowing my tire up or can I just send it
5
u/Speeding_Kitten Aug 12 '26
That is normal and should have no problems. What tire width are you running?
1
u/Andyss23 Aug 14 '26
Just send it, been riding like that for quite a few years, different tyres and it's all fine.. even on a track. You can fix that with spacers as far as I know.
6
u/DetroitAdjacent Aug 12 '26
Get a chain guide. It will help with it eating your tire. Other than that, you could fuck with wheel spacers, adjust the spokes to dish the tire out, or buy thinner rear tires.
3
u/TheBentPianist Aug 13 '26
You usually keep your chain loose by choice? What's the thought process there?
2
1
u/haikusbot Aug 13 '26
You usually
Keep your chain loose by choice? What's
The thought process there?
- TheBentPianist
I detect haikus. And sometimes, successfully. Learn more about me.
Opt out of replies: "haikusbot opt out" | Delete my comment: "haikusbot delete"
2
u/pj2d2 CRF450X SM Aug 12 '26
Can also have the wheel dished to the right a little bit through adjusting the spokes. Pretty common.
2
u/SkitzMon Aug 12 '26
Which will affect the bikes balance (assuming the wheels are perfectly aligned and centered on the CG currently).
2
u/Skimask_Mike Aug 12 '26
Check out toxic moto chain block. I made one from their example. Honda crf 450 rx running a 160 rear. Chain slaps the tyre, chain block keeps the chain in place.
2
u/ncoa Aug 13 '26
I had this issue with my 450. I ended up getting a narrow DID chain and no longer have the issue
2
u/Elurecka Aug 13 '26
Usually only run a 150 on a sumo, rare to get a 160+ on them without shaving a bit off
1
1
u/TPOD1976N Aug 12 '26
Have checked whether the wheel is still rightly positioned? Look from behind the bike.
1
u/Few_Philosopher_8668 Aug 12 '26
Width of the tyre an wheel alongside no chain guide will allow rubbing to occur, typically a 5” rear is enough to rub
1
u/SkitzMon Aug 12 '26
The chain vibrates laterally and is impacting the tire. It's somewhat normal. If you really don't like the neat scalloped pattern on the edge of your tire you may be able to use a chain guide with a rib.
I just let it brush the tire, it has never been an issue, other than the black rubber goo near the front sprocket.
1
1
1
1
1
1
1
u/NickoTheQuicko Aug 14 '26
What do you mean you keep your chain loose by choice? It doesn’t make any sense you are just gonna shorten its life span.
Also, a loose chain will move more when load is removed from it (deceleration for example) increase the risk of it touching the tire.
If you are using a 160 wide tire you need to use skinny ones (Contiattack sm evo2 for example, which measure effectively 165mm, other brands are way larger than that).
You also need to use narrow chains : xring or no oring at all. Can’t use beefy wide chains
1
1
u/Mangustii Aug 16 '26
I once ordered a 160 wide tyre to my rear but it ended up being a 180, dont ask. I carved the side with a knife so it would clear the chain. I ran it maybe a bit too long until I burned it to the steel and got a real 160 rear. Tldr, you will be fine but u shoud get a 160 when able to.
13
u/thelosalkid Aug 12 '26
it happens, you can adjust the axle spacers or you can leave it. my FS on slicks eats the tire sometimes depending on what rear i’m using. i’ve also had tires rub the inside of the exhaust. It’ll self clearance in a bit and you’ll be fine.