I'm having some real issues at the moment, and hope anybody can help to diagnose the problem. Apologies for what may turn out to be a lengthy background story!
So on 3 of my last 4 rides I have sustained a heat puncture. Never had one in years of riding and then 3 within a week. All have come on steep, tricky(ish) descents.
The first one was in the wet on a cool day, the second two on dry, warm days.
On each occasion the front rim has been incredibly hot, too hot to hold, so have had to wait a minute or two before beginning the repair - that hot!
After the first one, I noticed that the rim tape was a little skewed in places, some of the spoke holes were just showing. I figured that that was the problem. It was nylon-type rim tape, quite stiff, and out on the road I wasn't able to do anything with it so I put a new tube on and hoped for the best. It got me round a further 50 miles and then I guess I thought it would be fine.
Since then I started using the rear brake a lot more, to share the load, allow the front to cool a bit more, but I've locked up the rear at least once as a result and have lost lots of confidence on descents, I don't trust either brake anymore.
After the second one, when I got home I removed the rim tape, and not having any to replace it with, used 2 layers of electrical tape. I know this isn't exactly recommended but it's what I did. Electrical tape or not, it's the heat level of the rim that concerns me most.
Here's the facts:
Me : 15 stone ish, I take quite a lot of stopping on a steep descent, but I love climbing, and living in North Lancashire there's plenty of it, I have climbed and descended using the same equipment, or equivalent, for many years and this has never happened. Can anyone try to explain what might be causing it to happen all of a sudden?
Wheel: Pro-Lite Bracchiano
Tyre - Schwalbe Ultremo ZX,
Inner tubes - I have always bought the cheapest I can find
Brakes - Shimano 105, and I think the pads are 105 too.
All of this gear is in good condition but none of it is new, and I have descended plenty of hills using this stuff before.
Thoughts? experiences? where should I be looking to solve this?
Thanks in advance.