Bridgestone Headtubes/Headsets -- JIS or ISO???
05-22-09, 08:09 AM
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Bridgestone Headtubes/Headsets -- JIS or ISO???
Just wondering if anyone knows if old Bridgestones like the RB-1/RB-2 require an ISO or a JIS headset?
Thanks!
Thanks!
05-22-09, 08:54 AM
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I'd be willing to wager ISO.
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This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.
This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.
05-22-09, 08:57 AM
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Oh, I would bet good money on JIS.
jim
jim
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Cross Check Nexus7, IRO Mark V, Trek 620 Nexus7, Karate Monkey half fat, IRO Model 19 fixed, Amp Research B3, Surly 1x1 half fat fixed, and more...
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SB forever
05-22-09, 08:57 AM
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The inside diameter of my 1989 MB6 is 29.84 mm. The fork's crown takes a 26.4 mm race.
05-22-09, 09:00 AM
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My '85 Bridgestone 400 came with a JIS crown race and I had the LBS mill it down to ISO size when I replaced the headset. The ISO cups seemed to fit properly in the headtube so the OEM may have been a mixed size.
By the time the RB series came along I believe they were all ISO.
By the time the RB series came along I believe they were all ISO.
05-22-09, 10:10 AM
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Yes, the bike in particular is an early 90s RB-2, one of the Grant Peterson designed ones. I would guess its ISO but wanted to ask. Dont have the bike yet, or else I would measure.
Wanted to order a new headset while I am waiting for the bike.
Wanted to order a new headset while I am waiting for the bike.
05-22-09, 10:21 AM
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05-22-09, 11:44 AM
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Yeah, the bike gods are cruel. Whatever size you order will invariably be wrong. Do not temp the gods. And if you get all fancy and order both, then you are sure to find a cracked braze when you look again.
jim
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Cross Check Nexus7, IRO Mark V, Trek 620 Nexus7, Karate Monkey half fat, IRO Model 19 fixed, Amp Research B3, Surly 1x1 half fat fixed, and more...
--------------------------
SB forever
Cross Check Nexus7, IRO Mark V, Trek 620 Nexus7, Karate Monkey half fat, IRO Model 19 fixed, Amp Research B3, Surly 1x1 half fat fixed, and more...
--------------------------
SB forever
05-22-09, 07:54 PM
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This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.
This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.
