Buckling wheels on a 99 gtb?

[Hailz]

On my mates 99 GTB he keeps bucking the wheels quite badly eg they cant be balanced out, does anyone know why this would keep happening? Running standard 17s, It sits on HKS springs which are very low eg tyre under guard slightly, the shocks bottom out all the time due to this, my thoughts are this is whats causing the wheels to bend, tyres always run correct pressure, anyone out there got any clues?

[Guest boostcut]

start dodging potholes and keep away from kerbs?

[subieboy]

Pre-implosion there was a thread on this:

Someone mentioned that it was the factory alloys that tended to buckle and apparently this was due to being a weaker alloy...

[Glen]

I haven't buckled the rims on my GTB. And on my old 250T with 15's I bent two beyond repair.

[GravelBen]

I had a buckle recently - but it was with a puncture which I didn't notice until the tyre was fairly well shredded so that may explain it. 45-profile rubber doesn't offer much protection on rough gravel unfortunately.

[Guest]

 Hailz said:

On my mates 99 GTB he keeps bucking the wheels quite badly eg they cant be balanced out, does anyone know why this would keep happening? Running standard 17s, It sits on HKS springs which are very low eg tyre under guard slightly, the shocks bottom out all the time due to this, my thoughts are this is whats causing the wheels to bend, tyres always run correct pressure, anyone out there got any clues?

The tyre/spring/ and shock are all active parts of the suspension

Harden one part and you put more loading on another

Yes these 17's are not that uncommon to buckle on the inside bead

esp when they see pot holes / kerbs etc

So with your lowered and increased rate springs this would be a huge factor into these wheels buckling

[Guest dynofiend]

Pretty obvious really. If the shocks are bottoming out then the wheels are taking a proper hammering causing them to buckle. There is not enough compliance in the suspension to let the wheels move up and down enough to ride out the bumps, so the wheels undergo more stress, so they buckle.

Either raise the car to a sensible height, get stronger wheels, or drive slower. Up to him really.

[Joker]

yup was waiting for that comment to confirm my suspicions/suspensions

1.5 ton vs 8kg+ rim - maths is FUN!

[cuscogtb]

 Hailz said:

On my mates 99 GTB he keeps bucking the wheels quite badly eg they cant be balanced out, does anyone know why this would keep happening? Running standard 17s, It sits on HKS springs which are very low eg tyre under guard slightly, the shocks bottom out all the time due to this, my thoughts are this is whats causing the wheels to bend, tyres always run correct pressure, anyone out there got any clues?

I have HKS lowering springs on my BH5 and they are very low at the front but haven't buckled any of my wheels. Have had the springs for 6 months now and drove from palmy to dunedin with no problems. Maybe your mates running over too many big pot holes ;D.

I do want to raise the front tho cos its a mish getting in and out of a lot of driveways without scraping my lip.

[pl0x]

i think it would be the bottoming out part lol?

and the less sidewall you have means less adsorbtion i guess