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Old 08-15-2015, 07:07 AM   #1
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Will a 180 rear tire fit on 690 smc


The temperature is finally increasing. So it is time to release the horses from the barn and get some fresh air.

I miss the curves and can`t wait anymore…. I will go for a short trip on Sunday and was wondering if there's any KTM 690 SMC riders here who can tell me if I can run a 180 on the back without rubbing the chain?

I'm here in beautiful sunny Ulsan, South Korea where there are lots of twisties going up & down the mountains.
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Old 08-15-2015, 08:31 AM   #2
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A cursory Google search says yes, it will fit, and claim the chain will not rub.

There also seems to be two distinct camps on whether or not it is a worthwhile endeavor.
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Old 08-15-2015, 09:21 AM   #3
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I don't think it will fit....your OEM rim size is a 5" rim and that big 180 will bulge out of the rim. There is only maybe 1" of chain clearance on it with a 160 so I think it will definitely rub the tire. Not to mention that you will have a of a time getting that tire to fit back in the swing arm for installation and removal purposes. Why a 180? Are the 160s hard to get in S Korea?

A 180 will slow your turn in......
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Old 08-15-2015, 11:35 AM   #4
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A 180 will fit. The wider tire will be taller in the center causing a more abrupt turn in. It won't rub your chain because the tire will be pinched to fit the smaller rim. It's the same concept as putting a 190 on a 600, which a lot of track guys do anyways because of the increased contact patch in turns.
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