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I bought a front and rear tube for taking on rides in case I got a flat while away from home. I got the MSR Heavy Duty Tube 110/90x19 Part# 1017730009 and a MSR Heavy Duty Tube 80/100x21 Part# 1017730011. They are heavier than the original tubes but not by much. They seem fine but I managed to pinch both of them when I changed out my tires this past weekend. My fault. But still, they just don't seem to be really heavy duty tubes to me. A better tube is the Bridgestone Ultra Heavy Duty Motorcycle Tube 110/90x19 Part# 1003130004 and Bridgestone Ultra Heavy Duty Motorcycle Tube 80/100x21 Part# 1003130006. The Bridgestone is like 3 times thicker than a stock tube. A little more difficult to work with, but I bet I'll never get a pinch flat with those bad boys on my bike. I plan to run a lower air pressure with these because of how heavy they are. I bet they weigh more, but so what? It's unsprung weight. They cost $5 to $7 more than the MSR's. I'll try and patch the MSR and keep them as spares or loaners to someone out there some day. I've come across several guys over the years in staging areas and on trails with flats but no spare tire. It would be good karma to pass along a serviceable tube and that's about what I would consider using the MSR for.

So, I'm not the only one who pinches tubes when changing them?

I managed to kill 2 MSRs while changing just a single tire.
Unbelievable!

I certainly agree that not all 'heavy' tubes are truly heavy-duty!

No you are not the only one to pinch brand new pinch resistant tubes. In my defense and if you want truly HEAVY DUTY in a tube,check the MOOSE RACING heavy duty tube.Good God man.This tube is the thickest tube I have ever encountered and are advertised as much while selling FOR LESS than the others.
Ain't nothing wrong w/riding on a well patched tubed,one area I excell in.

Ski, thanks for the writeup, I plan on going to a HD tube in the rear next time I change a tire. I'll look into the Bridgestones you mentioned. I've pinched my rear once already and now I run 14PSI in fear of another flat.
The HD tube should allow me to run 12.

I bought an MSR heavy duty last week for the 65. I agree with your observation. It was just barely thicker than a standard tube. I have bought other brands (can't remember which ones) that were really thick. Maybe they were extra HD.

I use MSR or IRC Ultra Heavy Duty tubes, they usually come in a box two to three times the size of a normal tube

If you have any trouble installing such a tube you are probably doing someting wrong

Hey Ski, heavier tube=more traction! Its like putting antifreeze in a tractor tire for weight........It = traction, and torque! Prolly not much though...

I used the bridgestones on my XR and they are unbelievably thick. They are used by many dualsport folks due to their durability. Next tire change will by the bridgestone tube with the Pirelli MT43 trials tire.

It's flywheel weight.

Good, that saves me $130