Clydesdales/Athenas (200+ lb / 91+ kg) - Question about tires...

I want to change my MTB tires for some slicks. A friend gave me a pair of new Specialised Fatboy slick tires (26x1.25). My current MTB tires are 26 x 2.1. Can I just get a new tubes and put the 26 x 1.25 tires on on the same wheels? I'm near 300lbs...will I destroy these tires?

Thanks

Keep the tyre pressure high enough to prevent pinch flats and you'll be fine. They're good tyres and, if you get the armadillo option, they're virtually puncture proof.

I don't see any problem. Just make sure they are at/near max pressure.
The only potential problem I see is potholes. 1.25" is going to have to be aired up so that it's pretty hard. I kept to a 26x1.5", just to have a little more "squish factor" for my 250 lbs.

So I should be OK in regards to going from a 26x2.1 to a 26x1.25 on the same wheel (sorry , this is all new to me.)?

Yup, they will be fine. I took off 2.1's from my mtb. Switched to some Specialized 1.5 tires. They were great!

But I did have a tough time getting the Specialized tires onto the Mavic rims. Sometimes certain combos can be a tough match for one another. I mounted the 1.5's onto another mtb, was a piece of cake. So it can depend on the combo. Same with road tires.

If they are tough, be patient, usually works better if you're relaxed rather than stressing out!:D

Yes, mtb rims are made to hold certain sizes. 2.3-1.0 if I'm not mistaken. Could be 2.5 -1.5.

Some of the tubes I've bought for 2.125" tires were really skinny, where they'd have to double in size to fill the tire. If yours are like that, you don't even need new tubes. Pretty much as long as they're not wrinkled up in there, they should do fine.

I did the 2.1 -> 1.5 change on my ride as well. No problems at all.

Second the recommendation for Armadillos. I've only had one flat with them on, and that was from a very sharp piece of metal that managed to penetrate because the tread stood it on end. Even then, it was a very slow leak.

Make sure they're inflated to capacity every time you ride so that the lower volume tire can properly protect your rim.

I just bought Armadillos last week. Two flats. I think I'm cursed.