I have an old GIANT hybrid/touring bike. From my other posts you'll see a) I'm just getting into cycling, b) for fitness, commuting, trails with the family, c) I'm planning to change the Giant later this year.
On a recent commute I got a puncture. Hadn't a spare with me - oops. I promptly replaced the tyres (originals and 10+ years old I think) with Schwalbe Marathons to give some puncture resistance. I also got some "self-sealing" inners, white latex stuff, hmmm - not convinced but anyway.
The wheels are 700c, the old tyres were 700c x 35. The marathons are 700c x 32 to 38.
I've done 2 or 3 rides on this set up and the Schwalbe's felt great - more grip but less rolling resistance if that doesn't sound weird. This morning I set off and was shocked to find that the front was bulging out quite badly near the valve. I stopped, took the air out, moved it all back into place, checked no pinches or anything. Pumped it up (hand pump only definitely not over-inflated - I could squish the tyre with a hand). 100 yards later bulging out again. The back hasn't actually bulged yet but I'm watching it like a hawk.
On the face of it everything is the right size. What could I have done wrong ? Has the design of rims changed in the past 10 years ?
I bought the tyres and inners from Halfords (I know, but they had them in stock and I was in a hurry). I'm going to take the front wheel, tyres (new and old) and inners over to Halfords and see if they can tell me anything, but I have more hope that you guys will point me in the right direction.
On a recent commute I got a puncture. Hadn't a spare with me - oops. I promptly replaced the tyres (originals and 10+ years old I think) with Schwalbe Marathons to give some puncture resistance. I also got some "self-sealing" inners, white latex stuff, hmmm - not convinced but anyway.
The wheels are 700c, the old tyres were 700c x 35. The marathons are 700c x 32 to 38.
I've done 2 or 3 rides on this set up and the Schwalbe's felt great - more grip but less rolling resistance if that doesn't sound weird. This morning I set off and was shocked to find that the front was bulging out quite badly near the valve. I stopped, took the air out, moved it all back into place, checked no pinches or anything. Pumped it up (hand pump only definitely not over-inflated - I could squish the tyre with a hand). 100 yards later bulging out again. The back hasn't actually bulged yet but I'm watching it like a hawk.
On the face of it everything is the right size. What could I have done wrong ? Has the design of rims changed in the past 10 years ?
I bought the tyres and inners from Halfords (I know, but they had them in stock and I was in a hurry). I'm going to take the front wheel, tyres (new and old) and inners over to Halfords and see if they can tell me anything, but I have more hope that you guys will point me in the right direction.
