I took my race BMW rims into bike shop to get some tubes and the Avons I bought fitted. Logic there was they have a machine and balancer. I did a weekend at HD and last week a day of Superbike School, ran the back at 26 psi as recommended by Avon man. Unloading it found the back tyre flat Pumped it up and could hear hissing out of valve area, so did a Google and found that you should either not fit or only loosely fit the nut/ring that goes between the valve cap and rim. I took wheel back to said bike shop and explained what I thought had happened and they agreed that the nut is really only for pumping it up initially. Learn new stuff every day. Went back to pick it up and being in the line of work that requires a RCA ( root cause analysis ) for everything I asked to see the tube. " was it the valve" " no it was a crease in the tube and it rubbed till it punctured' you could see where there was about a Cm of overlap and a CM long split.... When I fit tubes old skool like I pump the tube up a bit so as to avoid pinching and the like, I'm thinking they may have fitted the tube flat, machined the tyre on and pumped it up. What do the old fullas think?
When i do my push bike tubes/tyres I always pump up the tube a bit and then deflate it so that it seats properly then inflate it fully the 2nd time. Is that the same principle?
Pity you need to run tubes on your wheels. I won't run tubes because they are more prone to punctures, than a tubeless assembly. Also, your tyre pressures change more dramatically with tubes fitted than when not. Your tyre man wasn't careful enough when fitting the tube to the rim. He probably nipped the tube between the lever and the rim edge when prying the case back onto the rim. I would find partial inflation a hindrance myself, as think it would make sliding the tube inside the tyre case more difficult. Go tubeless young man!
You need to use talc...I use cornstarch, it's much cheaper ( you learn these things with babies), this allows the tube to find it's own place in the tyre. Off road or no rim locks leave the nut off...a gutless road bike like an airhead shouldn't be a problem....down shifts are more likely to move the tube than the shear power of the bike.
Your tyre man wasn't careful enough when fitting the tube to the rim. He probably nipped the tube between the lever and the rim edge when prying the case back onto the rim If they had done that it would have been flat before Volty got it on the bike Did the split run across the tube or inline with it? Any tube tyre should use talc like Motu says, stops chafing
And do the inflate/fully deflate/re-inflate thing too, stops it twisting up in there.
Its tube month....this is off another BMW purchased recently. Looks much the same issue as the last one. Leak is pin hole on crease. Well got the cornflour as we have no need for baby powder... put the tube in and inflated to a soft on. got the tyre on and then pumped it up, deflated it a bit then pumped up again. I think the tube folded on itself during fitting and inflation, but hey I'm an office guy these days. Thinking of getting one of these, they get a good wright up on ADV rider. http://www.ebay.com/bhp/motorcycle-tire-pump
Yeah, those are folds or creases in the tube, to big a tube will also do that
Most punctures in tube tyres are caused by some foreign body, chafing etc, and very occasionally by something coming through the carcase. 30 years ago I bought a cheap and nasty 12v tyre inflator at a sale for $2. It's biggest moment was doing a puncture on my KM Bedford house truck at Atiamuri. It took me most of a lazy summer day, but it blew a 7.50x20 tube up and I repaired the hole, then it inflated the tyre to 80psi. Not bad for a stupid little compressor - I should get another one, but they seem out of my $2 range these days.
I have got one of these and I have to say I am impressed with what it can do. http://my-airman.com/product/inflators/tour
nice looking tool but a tad dear for poor me! http://www.ebay.com/itm/AUTOCOS-Comp...d96bc8&vxp=mtr here's one a bit cheaper http://www.ebay.com/itm/Airman-Tour-...item2ecd73254b
Wickle I think I paid about $40.00 landed here from the USA .... just the pump and not the jack.
Yes it has good review, might look into it. Was good practice today changing a tube by hand, bits of garden hose to protect the rim.
bits of garden hose to protect the rim I don't bother with rim protectors but then I'm usually changing other peoples
