MTFCA Forum

Just about didn't make it home from a cruise night with the valves on both rear tires bent over a 60 deg. I have brand new McLaren wires with brand new Firestones inflated to 60 PSI. What can I do the keep this from happening again short of running small screws through the rim side into the clincher?? I tried driving forward without heavy acceleration and slamming on the brakes and both stems came back a bit, but it didn't last long. I really don't want to remove the new tires and risk marking the new wheels.

Bruce,perhaps there is a small difference in the clincher edge of the smooth new rims and the clincher on the new tyres. I know new tyres are not made with the same substantial bead of the old ones. It may help if you run a rim liner. Those I cut from the outer circumference of 13" inner tube can be cut to width so that they partially fill the bead on the rim. Then the bead on the new tyres is firmer in the rim bead.

Another source of rim liners can be had by using 24" bicycle inner tubes to cut the liners. These will be thinner than the car tubes I salvage from local tyre dealers.

Hope this helps.

Allan from down under.

Are they powder coated ? A fella Model T guy did a comparison report on some tire slippage issues a while back don't recall if it was the tire or wheel ?

Bob C. - are you reading this ?

Yes, I believe Bob C did a VF article about this. His solution is spray the inside of the rim with truck bed coating. I tried it on a friends wheel with an old tire and it seemed to work.
Try the following link to take you to an Autozone page with the product:

https://www.google.com/search?q=rustole ... nt=gws-wiz

 
 
Here is a link to my original article.
 
https://www.mtfca.com/phpBB3/viewtopic. ... 53#p103453

Powder coat is like glass. Slippage is not uncommon. Especially on lower pressure rims like drop center 26-7 wire wheels. (had this issue before an education) Of course being new manufacture (no surface pitting) the slipping issue is more prevalent. Use medium emery cloth in the rim clinch to dull the powder coat. I use WD-40 to mount tires on fresh paint/powder. It seems to disappear as opposed to soap. If you can straighten out the valve stem by accelerating/braking, you will be fighting this issue & replacing tubes.

I just bought some "no-slip" tape like you put on the edge of steps. I cut two 3/8" wide strips and stuck them on the inside of the rim near the clincher area. This seemed a lot less messier than paint. Time will tell.....

Bruce, I presume you are using flaps on McLaren laced wire wheels. Sometimes they can be troublesome. I removed a set from a friend's car when replacing the short valve stemmed motorcycle tubes which had been fitted. All but one of the Firestne tyres had to be replaced. The flaps were so wide that, when inflated, they did nor allow the bead on the tyre to go properly into the rim bead. There was a wear groove down to the canvas about 1/4" above the bead groove on each tyre, showing where the tyre had improperly seated. Just something else for you to check.

Allan from down under.

Allan, that is an interesting observation regarding the use of flaps!

Several years ago I re-rimmed the Buffalo’s on my touring car using American Vintage Rims (McLaren) clincher rims. These wheels were powder coated, then fitted with Blockley tires and tubes with no flaps (as instructed by Blockley). I never got around to putting any valve stem hardware on the metal tubes, and they are still standing straight up

I had set never had an issue
McLaren where powder coated
Pressure of the tire 60 psi
Only issue I ever had on clintchers of any kind
when tire pressues is less then 55 psi never used a flat

Kevin, did you use a rim liner over the spoke nipples?

Allan from down under.