Rear Tire size how wide???

[snoop358]

Can someone tell me what the widest rear tire you can fit on an 89 Katana GSX750F. Looks like their is about an inch between the tire and chain and 1/2 inch on the oppsite side do to the caliper brace arm. But I can make a new brace so that thier is also an inch of space on that side also. So if i modifiy the brace for clearene how wide and if left stock how wide. Thanks

[05RedKat600]

I believe those had a 3.5" wide rear rim, either way, the safest tire size is a 160. How much room is in your swingarm is irrelevant, it's the width of your rim that matters.

[Slofuze]

My 89 had a 160.......if you want to go wider, you may want to contact Krey and go with a different swingarm.

[MrBrant]

I wouldn't go any larger than a 150 on the stock 3.5" rim.

[phantasm]

Must be time for the "what's the widest tire I can fit" threads to start up again. Anway, 160 on the 3.5" rim. If you wanted to go wider there's a whole write up on what is needed and what rims are a direct swap etc....

[arsenic]

I wouldn't go any larger than a 150 on the stock 3.5" rim.

This is the only correct answer. 160 on a 4.5" rim, he has a 3.5" rim, I wouldn't go larger than a 150 tire.

Must be time for the "what's the widest tire I can fit" threads to start up again. Anway, 160 on the 3.5" rim. If you wanted to go wider there's a whole write up on what is needed and what rims are a direct swap etc....

That time never ends. If your gonna complain about "the widest tire" threads, at least answer right.

[05RedKat600]

This is the only correct answer. 160 on a 4.5" rim, he has a 3.5" rim, I wouldn't go larger than a 150 tire.


That time never ends. If your gonna complain about "the widest tire" threads, at least answer right.

10 bucks says OP goes with a 170 or larger.

[KAT TOY]

10 bucks says OP goes with a 170 or larger.

now you're just stirring the pot.

[05RedKat600]

now you're just stirring the pot.

No, stirring the pot would be betting on a 170 or larger tire AND saying it works just fine.

[arsenic]

No, stirring the pot would be betting on a 170 or larger tire AND saying it works just fine.

It does work fine... as long as you don't ride it.

[phantasm]

This is the only correct answer. 160 on a 4.5" rim, he has a 3.5" rim, I wouldn't go larger than a 150 tire.


That time never ends. If your gonna complain about "the widest tire" threads, at least answer right.

Type-o. My bad.

[Kreylyn]

Stock rim of 3.5" wide max would be 150/70.

Put a post 4.5" wide rim and you could clear a 160/70 without mods for the tire. A 170 would be real close, probably need some adjustment for the brake arm.

If you want to keep the matching curved spoke design of the pre, then a bandit 4.5" rim could be used (it's 4.5") if you spread open the swingarm forks by bending them for the larger hub (the bandit wheels are wider in the center too...). Your still maxed at 160 without some clearance work on the brake arm at least, possibly getting tight on the swingarm.

If you go any larger with like a 5.5" rim, and run a 170 or 180 on it... then your really needing to widen the arms drastically at the brace point to give clearance for the tire.

Widening the "arms" is only really needed if your not putting a 6+" stretch on the arms. If your stretching the swingarm, then your already compensating for the wider tire just by moving the axle slots away from the Y portion of the swingarm.

Krey

[GSXFJim]

Krey.. how far back would the axle need to go to get the tire to clear bends in the arm?

[Kreylyn]

Krey.. how far back would the axle need to go to get the tire to clear bends in the arm?

Well, it's a gradient change so... I'd say anything over 6" will clear what ever you put between the arms. If it's less than that, it will depend on how wide you go...

The simple check would be measure the clearance between the arms and mark where you have the minimal of max tire width + clearance, then measure that location from the stock. I recomend at least 13mm clearance each side, or 26mm total. Compare that to stock tire edge location and you have the answer.

Krey

[cintidude04]

I have a 750 pre SA stretched 3" and fits a 5.5" rim just fine.
Now do I use it? No, not my taste,ended up being a waste of money that is sittin in my garage.