wheel weight figures (unsprung details)

[Mark S]

I think it may be nearer 1 to 4, but either way, its multiplied.

Tyres make a huge weight difference, best to have wheel only weights.

Whilst the mk2 rim is heavy, its only average compared to most after-market rims. around 9.5-10kg from memory.

Rota are light, very thin and prone to break, the subzero is the lightest cast they do.

7j rims opens many more options.

ultimately, a forged, mag or spun alloy will save a lot of weight, combined with a lightweight tyre - tyres can vary so much.

10kg for a wheel and tyre combo is poss.

rotational inertia, unsprung weight etc is key, certainly for the circuit, again, this is key to the type of dampers you may choose for a race car.

[talkingcars]

Originally Posted by Mark S

Tyres make a huge weight difference, best to have wheel only weights.

Originally Posted by Mark S

combined with a lightweight tyre - tyres can vary so much.

contradict yourself there Mark!

The tyres make up part of the unsrung weight so should be included.

[Mark S]

Originally Posted by talkingcars

Tyres make a huge weight difference, best to have wheel only weights.

Quote:
Originally Posted by Mark S View Post
combined with a lightweight tyre - tyres can vary so much.
contradict yourself there Mark!

The tyres make up part of the unsprung weight so should be included.contradict yourself there Mark!

The tyres make up part of the unsprung weight so should be included.

I meant when measuring wheel weights, yes the combined weight is unsprung, without a doubt, but if your looking for a lightweight wheel, would you ask how much it weighs with tyres on? or without? - that was the point in that comment.

[Quadcam24]

correct, tyres vary as much in weight as wheels.
i found a list of tyre weights on the net some years ago and you can make big savings going for the right one, of course no point going for megalight tyre if the grip is poor, so its all a compromise.

[redzed]

Originally Posted by Mark S

I meant when measuring wheel weights, yes the combined weight is unsprung, without a doubt, but if your looking for a lightweight wheel, would you ask how much it weighs with tyres on? or without? - that was the point in that comment.

comment understood, and a valid one. thats why i put in the mk1 rim with normal tyre and a racing slick so you see a difference there.