TRMark said:
I have a set of TR4 steel wheels. How can I bench check them for wobble etc.?
On my TR3, the original steels were "not exactly perfect"; I guess after 50 years of driving, they'd hit a few chuck holes and street curbs. Car had a front end shimmy, usually between 45-55mph.
Wheels and new tires were balanced with weights, but still had a wobble (steering column, front end, back end) at speed.
I put each wheel on a spin balancer, spun the wheel, watched looking directly toward the front of the wheel, and saw the wheel actually wobble side to side. Pointed my finger from the side toward the edge of the steel rim, and watched the wheel move in and out, toward and away from my finger.
You could probably also do the same "finger test" just leaving the tire/wheel on the car and spinning it there.
I tried a few "wheel shops" that said they could straighten the rims - for $50 each. Bought 3 more used steel wheels ($25-$50 each), found they were bent also. Tried straightening again. No luck. You can slightly bend the edge of the rim itself (where the tire sits), but usually can't bend the center of the steel wheel without weakening the steel. Mortgaged the farm, sold my first born male child, buckled down and bought four new wheels from Moss. Put the tires back on, re-balanced, and the car runs smooth as glass. What a difference.
By the way, when I saw a wheel described by the seller as "balanced perfectly" - that sure didn't mean the wheel wasn't bent.
Your mileage may vary.
Tom