Don’t break my brake, my achy brakey brake…
Hi all,
My new oracle 29er wheel arrived from municycle.com in Germany yesterday (Wednesday). I got straight to work installing it in my Triton 29er ( frame custom made in 2009), but little did I know…
First issue: Disc side bearing was firmly pressed on, and I don’t have access to a bearing puller. After some research online, I managed to make my own bearing puller using a steel plate, some M8 threaded rod, M8 bolts, and my schlumpf crank setter bolt. Crisis averted, removed the bearing without issue. Must have been all those episodes of Macguyer I watched as a kid!
Second issue: I checked the “d’Brake” with my triton frame, and low and behold there was about 3.5mm offset between the threaded lugs on the frame bearing holders, and the bolt holes on the d’Brake. After racking my brain, I decided to do some d’Brake surgery with my trusty ol Dremel. I removed just enough material so the bolts aligned, and so the bolt heads were still countersunk. Now that I had fixed this problem, next was mounting the disc!
Third issue: The disc I used for this project as a magura MT2 with 180mm rotor. The heads of the bolts that attach the disc brake adapter to the d’Brake were too large to fit into the countersunk holes of the dbrake. So, again I pulled out the trusty old Dremel and gave the head of the bolts some grinder loving. They were also too long, and once fully screwed in actually rubbed the disc rotor, so I shortened them by 5mm with a dremel cutting wheel and then rethreaded them with my tap set! Another crisis averted!
Seeing I was in the mood for making and modifying stuff, I also got some old magura rim brake mount bolts, cut them, and rethreaded them so I could use the old magura frame mounts to route my disc cable. I fossicked around and found some black plastic toolbox dividers spare, and cut them up into strips, heated them with a torch, and shaped them to they fit around the disc brake hose. I then rounded the edges, and BAM, instant hose clamps.
As the standard hose length on the MT2 was 180cm, I also shorted the hose to a much more manageable length. I also took the Dremel to the MT2 lever and modified it to fit a spooner I had spare. So, all of that done, I then fiddled with the alignment of the disc, and got it after a while. Talk about a long process, all that was finished after lunch today (Thursday).
I have a standard muni loop I ride most days on the 29er. It’s about a 10km loop, a mixture of gravel paths through the forrest, single track through pine forrests, some dirt roads, and a little bitumen. There’s a few sections with technical climbs and descents, but it’s mostly gently undulating over the terrain. Being familar with the ride (ridden it most days for the last 2 months), I was looking forward to trying it now I have the new 29er setup…
I have previously had magura rim brakes on my muni’s, and this is my first foray into the world of discs. First up, the disc is much more responsive, and braking is very smooth. It rained earlier today, and the tracks I usually ride were muddier than usual. I was aiming for most puddles, and ended up with a fair bit of mud all over the place, but the disc was still consistently grippy even though it got a mud bath.
Another thing I noticed was the 29 X 2.4" ardent now feels a lot fatter and stable over bumps than previously. I attribute this to switch from a 38mm XC KH 29 rim in the old wheel, to a 47mm 29" KH freeride rim in the new wheel. Maybe it’s just in my head, but the uni really plows through the soft stuff now!
By the end of the ride there was a small problem with the d’Brake and the tightness of the bearings. I will keep a close eye on the mount, as I modified it a fair bit to fit my frame, I still don’t feel 100% with the setup. I have contacted the Triton guys to see what kind of turn around I am looking at get a frame mount added to the frame, so I might end up going that option in the future if the d’Brake doesn’t work out.
Anyway, thanks for reading, and I look forward to sharing more of my thoughts on the disc brake system, now that I have it finally installed and functioning!
Cheers,
Dmac
Photos:
1: My old wheelset, '08 KH Ti hub, Ti spokes, KH 38mm XC 29" rim.
2. The new wheel! Oracle hub, SS spokes, freeride 29" rim, 29 X 2.4" Ardent, foss tube.
3: Brake setup.
4: Homemade hose clamps and mounts.