That said,
- the OE tubes in mine are doing ok. I hit a rock on the Lakes weekend at 'enthusiastic' speeds - hard enough that I was worried I'd dinged the rim, let alone pinched the tube.
- similarly, I was wondering at the start of the year if I should put mousses or tubliss inserts in the tyres on my Enduro DRZ. In the end I didn't bother, and left the old tubes which were on it when I bought it. Dunno if they are normal or HD. Despite being run at (slow - but considerably faster than I ride trails) enduro pace at 10-15psi I haven't had a puncture in about 18 hours of racing this year.
Basically, I wouldn't bother. I'm more worried about picking up screws and other crap on the road than punctures from trail riding, and HD tubes won't help you with that.
If I start getting a lot of punctures I might change my mind
