Stubborn Hard Tires

[ThreePedalTapDancer]

I saw a pic online of this neat homemade tire stretcher. It is made from cut down motorcycle rims attached to vintage car jacks. Your could easily make something similar using junk T rims too.

[Allan]

There's a bit of a conundrum there. The rim used is a drop centre rim which takes standard straight side tyres like 26-7 Ts use. These do not stretch. It would work if a clincher rim was used on clincher tyres, but the stretch would be concentrated at the two points on the side.The blow-up modern tyre trick stretches at all points.

Allan from down under.

[speedytinc]

There's a bit of a conundrum there. The rim used is a drop centre rim which takes standard straight side tyres like 26-7 Ts use. These do not stretch. It would work if a clincher rim was used on clincher tyres, but the stretch would be concentrated at the two points on the side.The blow-up modern tyre trick stretches at all points.

Allan from down under.

Dont know this trick. Does it use a deflated modern tire inside a clincher & inflated? Could you expound?

[DanTreace]

Here is a picture. Neat trick for stiff tires that you want to still mount.

photo from this site:

https://www.fordmodelt.net/blog/2017/09 ... brilliant/

[Allan]

That's it John. Find a modern rim and tyre, deflate it and lever the clincher tyre over it, and then inflate the tyre again. My starter is a half worn 185 x 75 x 14" wheel off a Datsun! With two really shrunken old Olympic tyres, I had to start with a smaller one before graduating to the usual size. Warm weather helps.

Allan from down under.

[tom_strickling]

What size modern tire works for the set up shown in Dana's post?? What tire size?

[Erik Johnson]

Straight side tire beads do not stretch because there is a wire in the beads.

As others have mentioned, clinchers do stretch - there is no wire in the beads.

The photo posted by Dan Treace is how my dad stretched the tires for his 1910 IHC roadster 60 years ago. The car has 27 inch wheels and should have 34 x 3.5 clincher tires but those weren't available at the time. He bought metric 875 x 105 Dunlop tires (26.18 inch inner diameter) and put them one at a time around a truck tire and rim, inflated the truck tire and and let them sit overnight. That did the trick.

[DanTreace]

What size modern tire works for the set up shown in Dana's post?? What tire size?

The author of the article used 185/75Rx 14 which have a normal inflated diameter of 24.9". That should work well for 23" id clincher tires or the 30x3 clincher too which is 24" id.

So going to find a used but air holding 185/75R x 14 tire on a wheel and try it with both 30x 3 1/2" and 30x 3" clinchers.

Other sizes are 175/75R x 14 which is 24.3" diameter or 195/75R x 14 which is 25.5" diameter but those may be too small or too large to do the job.

My utility trailer uses 205/75R x14 but those are too big even deflated to fit a clincher tire over the carcass.