Chinabomb Disc Brake Road Bike Build
#76
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Thread Starter
Per UAM, the clincher version of the same rim is 100 grams heavier. So you'd be looking at 1660-ish grams for the wheelset, all else equal and based on my actual build's weight.
#77
Senior Member
Thread Starter
My first attempt at a how-to video, converting a HY/RD caliper with one of my short pull arms:
Forgive the sniffles
Forgive the sniffles
#78
Junior Member
My first attempt at a how-to video, converting a HY/RD caliper with one of my short pull arms: https://youtu.be/JoNIqoguOKs
Forgive the sniffles
Forgive the sniffles
Hi Joe,
Short pull arms installed and tested this weekend. Very straightforward with the video instructions. I was able to change the levers with the brakes installed on the bike. All worked fine on a 50 mile hilly ride.
Some photos attached, the brake level pulls shown are with the drilled arms and with yours fitted for comparison. As can be seen your levers are at least as good as my best efforts at drilling 2 mm holes and would be much better than the 'hacksaw' approach.
I'll share some more specific feedback directly.
All the best,
Alan
#79
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Thread Starter
Alan, you rock! Thanks for the feedback!
#80
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Hey Joe. Would send you a PM but restricted as a new member. Do you have a set of arms that can be sent my way? Will certainly provide feedback to help with R&D. Just installed a HY/RD caliper yesterday and explored the options out there for remedying cable pull and your solution seems the most deserving by far.
#81
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And a cottage industry is born ......
#82
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Hey Joe. Would send you a PM but restricted as a new member. Do you have a set of arms that can be sent my way? Will certainly provide feedback to help with R&D. Just installed a HY/RD caliper yesterday and explored the options out there for remedying cable pull and your solution seems the most deserving by far.
...and one of these days I will get that Chinabomb finished, too. It's literally just waiting on me finishing the cable housing, taping the bars, and installing the chain. Kids and job have been taking up all my time.
#83
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Good luck with the bike. I'm excitedly finishing up a bike build myself at the moment, hence the TRP purchase. Too bad I don't have kids yet When the arms are made I'd love to give them a try! Are you CNCing them out of aluminum?
#84
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Good luck finishing your bike, too!
#85
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In case anyone wondering, my thoughts from tonight are as follows:
1. Internal cables: good
2. Compressionless brake housing: good
3. Internal cables + compressionless brake housing: total pain in the ass
1. Internal cables: good
2. Compressionless brake housing: good
3. Internal cables + compressionless brake housing: total pain in the ass
#86
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I installed the internal cables before installing the bottom bracket. Big help.
#87
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#88
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Uh, not exactly no. How do you think I know that doing the initial installation before the bottom bracket was a big help? But fortunately the -066 frame has that big plug in the bottom of the BB shell to help with the cable replacements and you can use cable liner from Jagwire as guides. It all works out in the end. If I can do it...
#89
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Well ... I am about to change my cables, so we shall see. I am Definitely no t pulling that dam*ed BB .... I will try the thread method and see if I can get the the thread to cling to the new (slightly lubricated) cables.
Whatever. it is one of those jobs which once started, you have to finish, so .... I might use the "Curse and throw tools" method before I finally get it.
Whatever. it is one of those jobs which once started, you have to finish, so .... I might use the "Curse and throw tools" method before I finally get it.
#90
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Well ... I am about to change my cables, so we shall see. I am Definitely no t pulling that dam*ed BB .... I will try the thread method and see if I can get the the thread to cling to the new (slightly lubricated) cables.
Whatever. it is one of those jobs which once started, you have to finish, so .... I might use the "Curse and throw tools" method before I finally get it.
Whatever. it is one of those jobs which once started, you have to finish, so .... I might use the "Curse and throw tools" method before I finally get it.
#91
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Thread Starter
That part was easy, even with the bottom bracket in place. The issue I had is getting the housing from the holes in the frame and fork to the calipers and to the levers from the holes in the bars (my handlebars have internal routing, too). I had my calipers perfectly adjusted to the rotors and my brake levers set where I wanted them but simply could not get the ultra-rigid housing into the stops on the calipers and levers without loosening everything completely. The stuff just doesn't bend and with the tight bends forced by the internal routing I had no chance of preserving my previously installed and adjusted items. Not a huge deal but annoying especially late at night. Had I known this would be a problem I could have saved myself a lot of hassle.
#92
Senior Member
C'mon build it already! I want to see the finished bike
Also Jagwire has new cable housing where the metal inside isn't wrapped completed around, they use less of it and it is now braided. Maybe that would be more flexible?
https://www.bikerumor.com/2016/10/11...sing-ways-one/
Also Jagwire has new cable housing where the metal inside isn't wrapped completed around, they use less of it and it is now braided. Maybe that would be more flexible?
https://www.bikerumor.com/2016/10/11...sing-ways-one/
Last edited by zymphad; 03-28-17 at 10:12 AM.
#93
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#94
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C'mon build it already! I want to see the finished bike
Also Jagwire has new cable housing where the metal inside isn't wrapped completed around, they use less of it and it is now braided. Maybe that would be more flexible?
https://www.bikerumor.com/2016/10/11...sing-ways-one/
Also Jagwire has new cable housing where the metal inside isn't wrapped completed around, they use less of it and it is now braided. Maybe that would be more flexible?
https://www.bikerumor.com/2016/10/11...sing-ways-one/
#95
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Thread Starter
C'mon build it already! I want to see the finished bike
Also Jagwire has new cable housing where the metal inside isn't wrapped completed around, they use less of it and it is now braided. Maybe that would be more flexible?
https://www.bikerumor.com/2016/10/11...sing-ways-one/
Also Jagwire has new cable housing where the metal inside isn't wrapped completed around, they use less of it and it is now braided. Maybe that would be more flexible?
https://www.bikerumor.com/2016/10/11...sing-ways-one/
I'll go true weight weenie some day but haven't on this build. I swear I'll be done soon, though. Sorry to keep you all waiting so long.
#96
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Thread Starter
Done. Sorta. I want the brakes to engage sooner so I need to modify the brake arms slightly. I also need to adjust the calipers a bit to get rid of a tiny bit of rub, and probably swap the stock TRP pads for the Shimano pads I bought based on interwebz recommendations.
16.65 lbs. as pictured (should be ~16 lbs. without Ultegra pedals and cages). Sub-15 lbs. would be no problem with TRP Spyres, 25mm tubular rims, and 23mm tires. I feel like that's in my future once I work out how to make a shorter pull arm for the Spyres.
Bike shifts ok on the stand. Need some time on the road to really fine tune. I was wondering how well a 410mm chainstay frame with 135mm dropout spacing would shift with a crank clearly not designed for disc brake geometry but all seems well. Campy levers FTW! Wish I had made the switch years ago.
More, and better, pics to come. Had to do real work up until 9:30pm tonight so no desire to setup to take to a decent photo.
#97
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That works. The curtains accent the gumwwalls.
Looks great .... but the amount of mechanical fiddling that went into it puts it beyond me. But it looks real good.
Looks great .... but the amount of mechanical fiddling that went into it puts it beyond me. But it looks real good.
#99
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Done. Sorta. I want the brakes to engage sooner so I need to modify the brake arms slightly. I also need to adjust the calipers a bit to get rid of a tiny bit of rub, and probably swap the stock TRP pads for the Shimano pads I bought based on interwebz recommendations.
16.65 lbs. as pictured (should be ~16 lbs. without Ultegra pedals and cages). Sub-15 lbs. would be no problem with TRP Spyres, 25mm tubular rims, and 23mm tires. I feel like that's in my future once I work out how to make a shorter pull arm for the Spyres.
Bike shifts ok on the stand. Need some time on the road to really fine tune. I was wondering how well a 410mm chainstay frame with 135mm dropout spacing would shift with a crank clearly not designed for disc brake geometry but all seems well. Campy levers FTW! Wish I had made the switch years ago.
More, and better, pics to come. Had to do real work up until 9:30pm tonight so no desire to setup to take to a decent photo.
#100
Blazer of saddles, trails