Preventing bead failure

[SHELRACING]

Looking for some advice from a tyre expert, which I am not.

I have a GS500 (ex Frosty), which I am going to use for a couple of track days, and the Pre 89's at the Taupo spectacular at christmas

I have picked up some good Tyres
The original front is a 110/70/17 Dunlop - The new front a 120/70/17 Battleax BT-002, so Shouldn't be any issues fitting here.

The rear is the problem
The Rim is a 17 x 3.5
The existing tyre is a 130/60?/17
I know for sure the rim will take up to a 150 without bead failure

The Tyre I have been given is a 160/60/17 Dunlop sportmax GP. Anyone know if it will fit the rim without bead failure. If it won't will installing a tube be of any benefit.

Consider it's only a GS 5 hundy and not a rocketship. Any advice appreciated

Cheers in advance

[mouldy]

Get a set of Bridgestone Bt45s for it in a 110/70/17 front and a 140/70/17 rear for optimum contact patch when leanning over , tyre shape is determined by rim size and overtyring leads to decreased contact . I know my shit .

[DEATH_INC.]

You won't have bead problems, but it will be shit. the shape will be all wrong. 150/70 max, and even then only certain tyres will sit ok. The best I found was a 140/80 bridgee, but dunno if they still make this size, otherwise a 130/80 will sit better than a 140/70.
Ditch the front too, i'm guessing a 2.5" rim? 110/80 would be much better.

[Taz]

I'm with mouldy on this and he does know his shit. But if it's all about image then fit a 180/55.....

[FROSTY]

I agree with the above --Be very carefull tossing in that 120 --without spacers I suspect youre gonna have clearance issues when under brakes

[Mishy]

Yeah, just don't do that to yourself.
The 120 is no good on a small rim. They are designed (as all will know) for a 3.5 inch rim, and fitting to a smaller rim will give you a smaller contact patch, less grip, and will wear a weird step in the shoulder of the tyre.
Don't do it.

As for the rear, overtyring is equally bad. If It's supposed to have a 130, then fit a 130, not a 150, and CERTAINLY NOT a 160. You could stretch to a 140 for the rear, but just remember that the guys that built the bike kinda knew what they were doing, and if a 160 was the shit, they would have fitted it.
Fit right sizes = have good handling bike = have fun :)

"bead failure" (?) is the least of your worries !