29er tube in Nightrider at high pressure?

[Rowan]

I bought a new nightrider recently and installed it with my existing coker innertube. It was as tight as ever to put on, and I made sure it was seated at low pressure before inflating it up to 65, having confidence in the rating since I have owned a nightrider before. I went to show my flatmate and about a minute after inflating it, it went BOOM! and it must have crept off the rim without me noticing. It put a hole about a foot long in the innertube.

@deadbeatpope

The blowout is a seating issue with the tire. Little chance that the tube is the problem. Bigger tires are more problematic especially when they are new or have been folded.

When installing the tire check carefully that the tire bead is seated well in the rim. Pump it up slowly and keep checking the tire all the way around as you go. You may want to ride it briefly at pressure intervals just to make sure it is mounted evenly. The higher the pressure and the bigger the tire the more careful you should be.

I didn’t pay enough heed to the warning about “new” tires. It is only so often you get brand new big tires and I knew to be careful but I didn’t think to be extra careful.

Since I posted in this thread I felt compelled to try the 29er tube I had lying around, and managed the wrestling match without lubricants by inflating and deflating to stretch it on and then get it out of the way to not pinch. It seemed easy but only because I had been warned about potential problems. This time I didn’t put full pressure in and started out soft how Corbin likes it.

@corbin

The 32 feels soft and good on the road. Higher pressure makes it harder to ride fast.

Usually I would disagree but there was this one time when I got a puncture and it was fairly slow- I got to ride with a whole range of pressures without getting off to let air out. At first I felt like it was getting a bit more sluggish but then it felt a bit like I was bouncing along at a reasonable speed and getting extra smoothness from the soft tire cushioning the road bumps. There came a point when it started digging in to turn and I had to dismount eventually. You would know better than me anyway Corbin, being a much faster rider, so you probably know best. Unless it is a short-leg thing.
I still like firm- I’ve put a bit more air in but have been too scared to go back to 65 with the new tire again.

The 29er tube feels nice-
I used a Cheng Shin 700x52/47 tube.
I got some spares and weighed them at the supermarket. The checkout operator put the tubes through as Yams and then cancelled them.
The Coker tube weighed 502g and the 29er was 178g.
The prices at Unicycle.co.nz are $45 for the Coker tube and $18 for the 29er tube, so you don’t want to have too many blowouts if you can help it.