Dual pivot caliper brake question
#1
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Dual pivot caliper brake question
I need to install a bracket for an accessory on the front wheel of my Bike Friday pakiT. It attaches behind the dual pivot caliper brake as well as at the forks. My current brake, a shimao 105 dp caliper, sticks out too far from the mounting hole to fit the bracket, which essentially goes "on top" of the brake. The brake is about 1.75" long from the mounting hole, it's very robust and also quite thick. I need a dp caliper brake (of good stopping power) that will work with my existing Tiagra 4700 super SLR flat bar levers, but that is not much
wider than 1.25" from the mounting hole. Are there any dp calipers known to be fairly slim, low profile, that might work? I've got various pivot bolt extensions but that doesn't
solve the problem of the fixed depth of the bracket I need to install which mounts flush to the frame hole, behind the caliper brake.
wider than 1.25" from the mounting hole. Are there any dp calipers known to be fairly slim, low profile, that might work? I've got various pivot bolt extensions but that doesn't
solve the problem of the fixed depth of the bracket I need to install which mounts flush to the frame hole, behind the caliper brake.
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My brake fits fine except to add the mount for my friction drive....which needs a brake that is 1.25" or less front to back. The Shimano 105 is much longer. It's not really a BF
issue at all, it's an issue with my friction drive mount.
issue at all, it's an issue with my friction drive mount.
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Pictures required.
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Yes, except...this is a commercial unit, not a DIY, and I bought it specifically because I'm not skilled enough to make my own. The bracket has a 1.33" extension so the caliper brake needs to fit pretty much within that length. There is a rear mount option but I really would prefer to NOT do that, so that's why I am trying to find a front brake that will fit the
supplied bracket. I do not have a picture of the one that works with caliper brakes but I do have a pic of the bracket for v-brakes; it's similar but there are special fork attachments for
the leg attachments for the caliper model.
supplied bracket. I do not have a picture of the one that works with caliper brakes but I do have a pic of the bracket for v-brakes; it's similar but there are special fork attachments for
the leg attachments for the caliper model.
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Ok, so I have looked at millions of pictures of caliper brakes and read tons of reviews. While it looks like these might fit in terms of my bracket needs (I will have to hit a shop
to actually measure) I don't know if the will work in any way with my existing levers. Can I use Campagnolo Potenza brakes with Shimano BL4700 flat bar lever? I
would only be changing out the front brake; I will leave the rear the 105+BL4700 combo. I know Campy doesn't have a quick release, but I don't really care - it's a front
wheel so rare to flat, and I usually patch 'em while still on the bike anyway. I am mostly concerned about compatibility with the brake pull (something I don't completely
understand) and my levers have multiple adjustments for canti/v brake/caliper but I don't know if the Super SLR will be an issue. Any one know?
The other brake that looks like it might fit is Shimano Dura-Ace BR-7800. Would that be compatible with my BL4700 lever?
to actually measure) I don't know if the will work in any way with my existing levers. Can I use Campagnolo Potenza brakes with Shimano BL4700 flat bar lever? I
would only be changing out the front brake; I will leave the rear the 105+BL4700 combo. I know Campy doesn't have a quick release, but I don't really care - it's a front
wheel so rare to flat, and I usually patch 'em while still on the bike anyway. I am mostly concerned about compatibility with the brake pull (something I don't completely
understand) and my levers have multiple adjustments for canti/v brake/caliper but I don't know if the Super SLR will be an issue. Any one know?
The other brake that looks like it might fit is Shimano Dura-Ace BR-7800. Would that be compatible with my BL4700 lever?
Last edited by linberl; 06-08-19 at 05:59 PM.
#7
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I assume you found the picture not your bike , given I see V brakes ,
Perhaps vacate the front of the fork and mount the brake on backside , and your motor on the front..?
You do have several frame builders in the area , maybe modify the steel fork
replace the front wheel with a drum brake hub, and vacate the top of the fork crown entirely.
buy a disc brake fork from bike friday, etc.... etc.
Perhaps vacate the front of the fork and mount the brake on backside , and your motor on the front..?
You do have several frame builders in the area , maybe modify the steel fork
replace the front wheel with a drum brake hub, and vacate the top of the fork crown entirely.
buy a disc brake fork from bike friday, etc.... etc.
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I assume you found the picture not your bike , given I see V brakes ,
Perhaps vacate the front of the fork and mount the brake on backside , and your motor on the front..?
You do have several frame builders in the area , maybe modify the steel fork
replace the front wheel with a drum brake hub, and vacate the top of the fork crown entirely.
buy a disc brake fork from bike friday, etc.... etc.
Perhaps vacate the front of the fork and mount the brake on backside , and your motor on the front..?
You do have several frame builders in the area , maybe modify the steel fork
replace the front wheel with a drum brake hub, and vacate the top of the fork crown entirely.
buy a disc brake fork from bike friday, etc.... etc.
I just thought some caliper brakes might have been known as narrow profile....
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As the dimension you speak of isn't really an aspect that most component makers or their customers care about it should be no wonder that this spec isn't listed anywhere. I'll also speculate that this spec falls within a narrow range for most dual pivot bolt on calipers.
Of course the OP knows that installing and using an auxiliary power unit will void any warranty and pretty much stack any legal situation against you. Andy
Of course the OP knows that installing and using an auxiliary power unit will void any warranty and pretty much stack any legal situation against you. Andy
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As the dimension you speak of isn't really an aspect that most component makers or their customers care about it should be no wonder that this spec isn't listed anywhere. I'll also speculate that this spec falls within a narrow range for most dual pivot bolt on calipers.
Of course the OP knows that installing and using an auxiliary power unit will void any warranty and pretty much stack any legal situation against you. Andy
Of course the OP knows that installing and using an auxiliary power unit will void any warranty and pretty much stack any legal situation against you. Andy
Last edited by linberl; 06-10-19 at 11:55 AM.
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I'm glad the manufacturer says they're good with your mods. I hope that is reflected in their written warranty. Good luck. Andy
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