How do they measure the diameter of handlebars? Stock 95 Bridgestone RB1
09-22-07, 07:28 PM
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How do they measure the diameter of handlebars? Stock 94 Bridgestone RB1
I need a new stem as the 130mm length is a bit long for me.Pretty sure I need a 100-110mm stem.
Trouble is that I don't know exactly what diameter I'm looking for.
How do they measure the diameter.Do ya just lay a tape measure across it and measure or do you need to wrap something around the circumference to measure?
Trouble is that I don't know exactly what diameter I'm looking for.
How do they measure the diameter.Do ya just lay a tape measure across it and measure or do you need to wrap something around the circumference to measure?
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Last edited by PhilThee; 09-22-07 at 11:58 PM.
09-22-07, 08:06 PM
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You need something more accurate than a ruler. Handlebars for road bikes are commonly seen in 25.4 mm, 25.8 mm, 26.0 mm and 26.4 mm. Telling these apart requires an accurate caliper. MTB handle bars are almost all 25.4 mm so there is less ambiguity. Take the bike to an LBS if you don't have a suitable caliper.
Sometimes the handle bar diameter is engraved on the bars themselves or on the inside of the stem so that may answer your question if you get lucky.
I didn't include the newer "oversize" bars of 31.8 mm for both road and MTB bikes as your '95 was made way before they showed up.
Sometimes the handle bar diameter is engraved on the bars themselves or on the inside of the stem so that may answer your question if you get lucky.
I didn't include the newer "oversize" bars of 31.8 mm for both road and MTB bikes as your '95 was made way before they showed up.
09-22-07, 09:03 PM
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Best guess is 25.4 mm. Japanese bikes often used the ISO standard. If you can't get find anyone to measure it, you can try the BOB mailing list: https://www.phred.org/mailman/listinfo/internet-bob
09-22-07, 09:56 PM
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That's what I needed to know.I need to use a dial caliper.Thanks
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