Tyre fitting problem
 

Hi,
I have a wheel from Synuomin and the tolerance of the wheel means it is 2mm smaller than it should be. So the diameter is 620mm.
Does anyone know of any tyre (700 x 25c) that is a very tight fit usually so it might fit my wheel.
Any advice?
Thanks

Welcome to the forums, I see this is your first post. I'm going to suggest you reach out to the rim manufacturer. Let them know that you are concerned that their rim might not work with certain standard-sized tires. Perhaps they know of a brand that works well with their rims. I've encountered tires that were darned difficult to get onto rims, but never a rim that was that small. I think Gatorskins were some of the toughest to get onto a couple of my bikes, but I could be mis-remembering.

Good luck.

How did you measure the wheel to that precision?

Several people have complained about some of the Continental tires being tight, although personally I haven't had any issues with them.

The tightest tires I've encountered were some of the "tubeless" tires. For example, I utterly failed at installing a tube in a Schwalbe One Pro Tubeless. I assume other brands of tubeless tires would be similar.

Thanks I'll look into it!

Appreciate the info! I'll have a look!

I have had some that are hard to mount and others that are a touch easier. The hardest tires to mount are Challenge open tubulars, those suckers are a big ole' pain.

So the problem is the rim is smaller than standard, and you need a tyre that would be tight on a normal rim, so that it isn't too loose on this one? Is that right?

I recently put Continental Gatorskins on both of my bikes: 700c x 25 on one, 700c x 28 on the other. The rims on the 2 bikes are very different. In each case, I needed tyre levers and a certain amount of profanity to get the Gatorskins on.

With the previous tyres, on both bikes, I was able to remove and replace them easily at the side of the road without tools. So that tells me that Gatorskins are that bit tighter. They are also lovely tyres to ride, and have good puncture protection.

One thing you might also consider is making sure you have thicker trim tape.

For example, perhaps two wraps of Velox full width rim tape. Or, perhaps "Friction" cloth electrical tape from the hardware store (and a layer of Velox on top if sticky).

The extra tape should help keep your tire centered.