Axle to crown length
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Axle to crown length
So I'm stripping and rebuilding my Bianchi Reparto Corse cyclocross bike and discovered my fork is toast https://www.bikeforums.net/showthread...his-fork-toast Problem is it's pretty hard to find a replacement 1 inch threaded cyclocross fork. I've found some that could work except they have axle to crown lengths in around 400mm. Even if I open my search to 1 inch threadless that's all I find. My Bianchi fork is 380mm. That's seems like a pretty big difference to me in terms of how much it would jack up the front end. The frame was obviously designed for the 380mm fork. It's a level top-tube road bike type frame. What do you all think?
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The 400 length will provide a more stable bike with a very small reduction in steering quickness. After a few hours on the bike the change will not be noticed. I considered a modern fork on my Vintage Simoncini. I could not find a crowned 1" threaded model anywhere. This one looked the best of the 1" threadless models I saw: https://store.somafab.com/soclcucyfo.html It has a 389mm axle to crown length
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When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
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Thanks for the tip Barrett, so did you buy that Soma? What did you think of it? That would be only 9mm taller than my Bianchi fork so not as bad all the 400mm options. Of course it's more money than I was expecting to spend and I'd also have to get a threadless headset...
#5
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You can hire a replacement made, ship yours and say "Make it just like this one"
have the rake/offset to consider too..
does not have to be an Asian Import just to be Cheaper,does it?
Bikeschool.com has a long list of resources , frame builders and component manufacturers. & etc.
have the rake/offset to consider too..
does not have to be an Asian Import just to be Cheaper,does it?
Bikeschool.com has a long list of resources , frame builders and component manufacturers. & etc.
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The Soma fork has regular 80mm post centers. The fork also has a mount on the fork for a cable stop/hanger. Solid braking performance would be a no-brainer with that fork. I would lose the vintage quill stem and would be installing a modern threadless stem...
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When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
Last edited by Barrettscv; 11-03-13 at 08:47 AM.
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Hey Barrett, sweet ride, akin to my lugged steel 1996 Bianchi Reparto Corse. My problem fork looks similar to yours, lugged crown and fairly lightweight and slender. I could not get decent braking with cantilevers and I tried every which way of adjusting them. I had horrible fork juddering on hard braking, especially on pavement. Now that I think of it, I wonder if all that juddering could have contributed to the cracking in my fork crown? And now that I've resolved the juddering problem I don't have to worry as much about it? Fork judder is an inherent problem with Cantis, due to the bow and arrow effect of the brake cable between the cable hanger and the yoke. I'm thinking it's worse with slender steel forks like ours cuz they're more flexy. Anyways I finally solved the problem by going to a mini-v brake. That stopped the juddering completely and improved stopping power dramatically. I eventually got a Paul Mini-moto which is a pretty sweet little brake, though pricey. I realize it's not "classic" or traditional, but if you want to keep using that original fork you might consider it, worked wonders for me.
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Have a new fork made. Zero UNO should be source able, I built a frame from it a few years ago.
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Hey Barrett, sweet ride, akin to my lugged steel 1996 Bianchi Reparto Corse. My problem fork looks similar to yours, lugged crown and fairly lightweight and slender. I could not get decent braking with cantilevers and I tried every which way of adjusting them. I had horrible fork juddering on hard braking, especially on pavement. Now that I think of it, I wonder if all that juddering could have contributed to the cracking in my fork crown? And now that I've resolved the juddering problem I don't have to worry as much about it? Fork judder is an inherent problem with Cantis, due to the bow and arrow effect of the brake cable between the cable hanger and the yoke. I'm thinking it's worse with slender steel forks like ours cuz they're more flexy. Anyways I finally solved the problem by going to a mini-v brake. That stopped the juddering completely and improved stopping power dramatically. I eventually got a Paul Mini-moto which is a pretty sweet little brake, though pricey. I realize it's not "classic" or traditional, but if you want to keep using that original fork you might consider it, worked wonders for me.
What's worked for me on my my more modern bikes is the use of a fork mounted hanger and with good quality pads. My cycling isn't all that demanding. I do expect the front brake to lift the rear tire, however. I can also hit 45 mph a few times a year. I want the brakes to make a safe stop from any speed.
I can get the performance I want from the Soma fork if I use a fork mounted hanger.
However, the Paul Mini Moto's look interesting. Do I put on brakes that didn't exist in 1997 or do I replace an original Italian made fork that looks great, with a new & nice enough modern fork?
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When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
Last edited by Barrettscv; 11-04-13 at 07:19 AM.
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I suppose you've considered drilling your Simoncini fork to accept a cable hanger? It looks like a thin crown even thinner than mine so maybe you are worried about weakening it.
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Yeah the Mini Moto is nice. It is also easier to adjust than your typical canti. V-brakes, including this one, don't give quite the rim clearance that cantis will, it hasn't been a problem for me, but if you were racing in muddy conditions maybe it would be an issue?
I suppose you've considered drilling your Simoncini fork to accept a cable hanger? It looks like a thin crown even thinner than mine so maybe you are worried about weakening it.
I suppose you've considered drilling your Simoncini fork to accept a cable hanger? It looks like a thin crown even thinner than mine so maybe you are worried about weakening it.
I'm going to use this bike as a road & gravel bike, it won't see much mud. So that's all good with the Mini V's.
Yes, I don't trust myself, or anyone else, to drill the crown. It might start to crack.
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When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
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Hey Barretscv, If you are looking at the mini-motos I have a set of the TRP CX-9's (mini-v's) sitting in my parts bin. PM if interested.
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The mounting stud distance on my Bianchi fork is 70mm CTC. So I guess that's a little tighter than standard? 55mm does seem silly tight. Do you want to buy a fork - bargain price ;-)
Yep Mini V really improved my braking. It will help you on the road for sure. As long as your rim is reasonably true you won't have a problem. You're going to ride that on gravel and get the paint all chipped up? Just kidding you should see my Bianchi frame. BTW I kept the canti on the rear because there are no juddering problems back there and I didn't care about having matching brakes and one Paul Mini Moto is expensive enough as it is. I didn't notice a big difference in feel between the two brakes either.
Yep Mini V really improved my braking. It will help you on the road for sure. As long as your rim is reasonably true you won't have a problem. You're going to ride that on gravel and get the paint all chipped up? Just kidding you should see my Bianchi frame. BTW I kept the canti on the rear because there are no juddering problems back there and I didn't care about having matching brakes and one Paul Mini Moto is expensive enough as it is. I didn't notice a big difference in feel between the two brakes either.
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Well, I'm one step closer to fitting a Soma fork to my bike. I just got an email from the nice folks at Paul's explaining that the 55mm center distance will not work with Mini-Moto's.
I think keeping the original fork on this bike isn't going to work.
I think keeping the original fork on this bike isn't going to work.
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When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
Last edited by Barrettscv; 11-04-13 at 05:34 PM.
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Seems like Simoncini must have just taken a road bike and added canti posts to make cyclocross without thinking too hard about it. And I thought my Bianchi fork was a little lightweight, yours looks very minimalist. Out of curiosity, what is the mounting stud distance on the rear? What is your axle-to-crown distance? I'm betting it's even lower than mine which is about ~380mm.
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That probably was the case. Most cross bike raced on 28mm tires back then. Most likely built for Mafac canti's.
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Seems like Simoncini must have just taken a road bike and added canti posts to make cyclocross without thinking too hard about it. And I thought my Bianchi fork was a little lightweight, yours looks very minimalist. Out of curiosity, what is the mounting stud distance on the rear? What is your axle-to-crown distance? I'm betting it's even lower than mine which is about ~380mm.
The modern fork will greatly improve the braking and should help the stability of the bike, too. The new fork is a setback aesthetically, mostly because it will require a thread-less stem. But the bike is not going to be a wall-hanger.
Nolic, what solution are you leaning towards?
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When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
When I ride my bike I feel free and happy and strong. I'm liberated from the usual nonsense of day to day life. Solid, dependable, silent, my bike is my horse, my fighter jet, my island, my friend. Together we will conquer that hill and thereafter the world.
Last edited by Barrettscv; 11-04-13 at 06:35 PM.
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Well I'm curious about the Soma Classic curve as well, but between buying that and changing to threadless it'll be about over $250. I've been looking around on eBay. But I think I'm going to slap some clearcoat on my Bianchi fork and keep running it for now. I actually want to see if I can get it together to do a race this weekend. If you go to my other thread https://www.bikeforums.net/showthread...his-fork-toast you can follow the whole saga.