One inch steerer fork options to clear 28mn tire
10-19-24, 10:02 PM
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One inch steerer fork options to clear 28mm tire
90's steel race bikes were designed around 23mm tires. My Schwinn Series 5 PDG is a fantastic road bike. But it barely fits a Continental 28mm in back, 2mm clearance on an i19 rim. The unicrown fork barely fits a 25mm on i14. Tar Macadam is getting worse around Los Angeles, and we now know that bigger, lower pressure tires are faster on rough pavement. Safer too.
Finding a fork for this race/endurance bike is difficult. I don't want fender eyelets like you see on cromoly replacements, but a race level fork. One inch steerer are rare. The Ritchey Carbon Comp is rated for a 25mm with 4mm clearance, it is $300. There are a slew of no name full carbon on that Jungle site. How safe can they be in one inch? Alloy steerer instills enough fear already.
Finding a fork for this race/endurance bike is difficult. I don't want fender eyelets like you see on cromoly replacements, but a race level fork. One inch steerer are rare. The Ritchey Carbon Comp is rated for a 25mm with 4mm clearance, it is $300. There are a slew of no name full carbon on that Jungle site. How safe can they be in one inch? Alloy steerer instills enough fear already.
Last edited by roadrational; 10-19-24 at 10:04 PM. Reason: typo in title
10-20-24, 07:17 AM
#2
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90's steel race bikes were designed around 23mm tires. My Schwinn Series 5 PDG is a fantastic road bike. But it barely fits a Continental 28mm in back, 2mm clearance on an i19 rim. The unicrown fork barely fits a 25mm on i14. Tar Macadam is getting worse around Los Angeles, and we now know that bigger, lower pressure tires are faster on rough pavement. Safer too.
Finding a fork for this race/endurance bike is difficult. I don't want fender eyelets like you see on cromoly replacements, but a race level fork. One inch steerer are rare. The Ritchey Carbon Comp is rated for a 25mm with 4mm clearance, it is $300. There are a slew of no name full carbon on that Jungle site. How safe can they be in one inch? Alloy steerer instills enough fear already.
Finding a fork for this race/endurance bike is difficult. I don't want fender eyelets like you see on cromoly replacements, but a race level fork. One inch steerer are rare. The Ritchey Carbon Comp is rated for a 25mm with 4mm clearance, it is $300. There are a slew of no name full carbon on that Jungle site. How safe can they be in one inch? Alloy steerer instills enough fear already.
• No eyelets
• 700c
• 1" threaded steerer
• axle to crown: 369mm
• rake: 41mm
• drilled for a recessed brake (short/mid reach)
• clearance for up to most 32mm tires
Tange Infinity 1" threaded fork
$ 179.99(Edit: note that several choices of steerer length are available.)
Last edited by Trakhak; 10-20-24 at 08:20 AM.
10-20-24, 08:12 AM
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90's steel race bikes were designed around 23mm tires. My Schwinn Series 5 PDG is a fantastic road bike. But it barely fits a Continental 28mm in back, 2mm clearance on an i19 rim. The unicrown fork barely fits a 25mm on i14. Tar Macadam is getting worse around Los Angeles, and we now know that bigger, lower pressure tires are faster on rough pavement. Safer too.
Finding a fork for this race/endurance bike is difficult. I don't want fender eyelets like you see on cromoly replacements, but a race level fork. One inch steerer are rare. The Ritchey Carbon Comp is rated for a 25mm with 4mm clearance, it is $300. There are a slew of no name full carbon on that Jungle site. How safe can they be in one inch? Alloy steerer instills enough fear already.
Finding a fork for this race/endurance bike is difficult. I don't want fender eyelets like you see on cromoly replacements, but a race level fork. One inch steerer are rare. The Ritchey Carbon Comp is rated for a 25mm with 4mm clearance, it is $300. There are a slew of no name full carbon on that Jungle site. How safe can they be in one inch? Alloy steerer instills enough fear already.
I recently fitted an Origin8 Synergy straight-blade fork to an old Ti frame. ~$240, CF legs, 1” steel steerer, apparently clearance for 28mm (I run 25s on 15mm int. width rims. 25mm width actual). Not sure what “fear” alloy steerers instill🤔. Personally I’d be fine with a 1” CF steerer with a sufficiently low spacer stack (1-2 cm). With a 1” metal steerer (alloy or steel), I’d be fine with any spacer stack I might reasonably need (I have 2.5cm with the Origin8)
Last edited by 13ollocks; 10-20-24 at 08:24 AM.
10-20-24, 09:37 AM
#4
The Columbus Minimal is a very modern 1" all carbon fork with 28mm tire clearance.
10-20-24, 09:56 AM
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I'm surprised but I think my '91 Schwinn Paramount will have fit a 28mm tire with room to spare. It was a OS tube version. I still have access to it and a PDG version of the Paramount circa late 80's early 90's. I'll have to look when I get out there next spring to see.
I know you can't wait that long. But I've always felt that bikes of the early 90's and prior accepted wider tires as many still where based on designs when the 27" x 1-1/8 and 27" x 1-1/4 reigned just prior to 700C taking over. And those were 28mm and 32mm wide tires respectively.
What exactly is preventing the wider tire from fitting in that fork? The tread hitting the fork crown or brake calipers. Or the sidewalls hitting the fork blades or some other place? You do have a 700C wheel and tire on that bike don't you?
Welcome to BF!
I know you can't wait that long. But I've always felt that bikes of the early 90's and prior accepted wider tires as many still where based on designs when the 27" x 1-1/8 and 27" x 1-1/4 reigned just prior to 700C taking over. And those were 28mm and 32mm wide tires respectively.
What exactly is preventing the wider tire from fitting in that fork? The tread hitting the fork crown or brake calipers. Or the sidewalls hitting the fork blades or some other place? You do have a 700C wheel and tire on that bike don't you?
Welcome to BF!
Last edited by Iride01; 10-20-24 at 10:02 AM.
10-20-24, 05:28 PM
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Finding a fork for this race/endurance bike is difficult. I don't want fender eyelets like you see on cromoly replacements, but a race level fork. One inch steerer are rare. The Ritchey Carbon Comp is rated for a 25mm with 4mm clearance, it is $300. There are a slew of no name full carbon on that Jungle site. How safe can they be in one inch? Alloy steerer instills enough fear already.
What axle to crown height do you want.
I have this on a road bike and it's been great.
https://custom-junkies.com/carbon-ro...aft-300mm-590g
10-21-24, 10:37 AM
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Thank you for your reply. As a newbie I can't yet add pictures here. This was purchased used around 2010. But I had purchased another early nineties model new, and why I came back to this model. That one, as you describe, took a Michelin 32mm which was really more like a 28 or 30. I would ride to the race on those and change to 23's at the venue 
This one has a tighter Unicrown. Bummer.
This one has a tighter Unicrown. Bummer.
10-21-24, 10:48 AM
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Thank you for your replies! The Tange Infinity looks great but out of stock in the size I need. My preference is 1" threadless. Full carbon will eventually present "the ring of death". Aluminum is OK. Steel is immune to the death ring. The Origin8 with steel steerer looks good. 365Cycles as a version with 1" aluminum currently. It's like $250. The Columbus has the Italian history but is made in China. I'm fantasizing the Origin8 is from Taiwan. The 365 Cycles version is rated for 28mm. The Ritchey might take a 28, but specs show 25 max.
I'll probably go with the Origin8 Pro Synergy Road 1in 700C Threadless from 365 Cycles, or the steel steerer version listed on the Jungle Site. I didn't want to pay $250, but there is really no other practical choice for a bigger tire on this old bike. It would be nice if it was lighter, it's at 23 pounds now.
I'll probably go with the Origin8 Pro Synergy Road 1in 700C Threadless from 365 Cycles, or the steel steerer version listed on the Jungle Site. I didn't want to pay $250, but there is really no other practical choice for a bigger tire on this old bike. It would be nice if it was lighter, it's at 23 pounds now.
10-21-24, 11:53 AM
#9
Thank you for your replies! The Tange Infinity looks great but out of stock in the size I need. My preference is 1" threadless. Full carbon will eventually present "the ring of death". Aluminum is OK. Steel is immune to the death ring. The Origin8 with steel steerer looks good. 365Cycles as a version with 1" aluminum currently. It's like $250. The Columbus has the Italian history but is made in China. I'm fantasizing the Origin8 is from Taiwan. The 365 Cycles version is rated for 28mm. The Ritchey might take a 28, but specs show 25 max.
I'll probably go with the Origin8 Pro Synergy Road 1in 700C Threadless from 365 Cycles, or the steel steerer version listed on the Jungle Site. I didn't want to pay $250, but there is really no other practical choice for a bigger tire on this old bike. It would be nice if it was lighter, it's at 23 pounds now.
I'll probably go with the Origin8 Pro Synergy Road 1in 700C Threadless from 365 Cycles, or the steel steerer version listed on the Jungle Site. I didn't want to pay $250, but there is really no other practical choice for a bigger tire on this old bike. It would be nice if it was lighter, it's at 23 pounds now.
