Inner tubes
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613 Posts
Rear is a 17" Type "B" with a TR-4 valve
Front is a 18" Type "C" with a TR-4 valve
Try to find the "standard duty" tubes - "heavy duty" is not recommended for street tire applications.
Front is a 18" Type "C" with a TR-4 valve
Try to find the "standard duty" tubes - "heavy duty" is not recommended for street tire applications.
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613 Posts
These are just conversions (to inches from metric).
Example:
A 110/80-18 tire is 110 mm wide (approx 4.4 inches), the height of the tire from the bead to the tread is 80% (called aspect ratio) of the width, so it's approx 88mm tall (3.5 inches) and the wheel is 18 inches in diameter.
Tubes stretch a certain amount and therefore one size tube will fit several different size tires. A tube that says fits 3.25-3.50 X 18 means it will fit tires with a width of 3.25-3.5 inches with a wheel diameter of 18 inches. Tubes have a round cross section, so the aspect ratio of the tire isn't all that important.
I realize its all very confusing, so you would be better served finding a supplier that specifies "Type A, B or C" - which has become a more widely accepted standard.
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Have any of you replaced the inner tubes yourself? Is it easy to do? I got a flat this weekend and would like to be able to fix the tube myself in the future of it not too difficult. Also, is it something you could do on a trail?
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776 Posts
Not on the Scrambler I haven't, at least not yet. Doing it on a trail would very difficult. The biggest problem will be breaking the tyre bead away from the rim which I doubt if you could do with out some sort of bead breaking tool. If you can get the tube out you could apply as a patch as a temporary fix but a new tube is the only safe and permanent fix. I will be doing away with the tubes when it comes round to replacing the tyres, applying a Outex sealing system.
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Thanks for the info. I had a feeling it was going to be a pain to do.
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4 Posts
Whats a good way to go tubeless? On my mountain bike I run Stan's No-Tubes that stuff is amazing.
Had a screw through the rear tyre this morning in London. Recovery to Metropolis Vauxhall who didn't have a tube in the right size. October and their first rear puncture. Could be a week for Pirelli to supply. Riding the XT500 to work in the morning. Joy!
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589 Posts
If you're on the trail with a puncture and riding with another bike, you can use the sidestand of the other bike to break the bead. Just be sure to place something suitable between the two so you don't damage the sidewall. You'll also need a way of supporting the rim on the ground side ;-)
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16 Posts
Actual sizes/part numbers for reference:
Bridgestone Motorcycle Tubes
SKU: 1199320
Type: TR-4/TR-6
Tire Size: 180/60-17
$29.19
Bridgestone Motorcycle Tubes
SKU: 158067
Type: TR-4/TR-6
Tire Size: 110/100-18
$21.77
Bridgestone Motorcycle Tubes
SKU: 1199320
Type: TR-4/TR-6
Tire Size: 180/60-17
$29.19
Bridgestone Motorcycle Tubes
SKU: 158067
Type: TR-4/TR-6
Tire Size: 110/100-18
$21.77
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8 Posts
Thanks for the info. Does it matter that they're not the exact same size as the OEM tires? i.e. the OEM rear is 180/55/17 and the front is 110/80/18, would these sizes still be okay?
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