ya i think so howcome?
The site isn’t letting me attach a pic at the moment. but you can get a spider that bolts to those cranks and you can bolt one of the MountainUni rotors to that spider, and since the DX frame is steel, a weld on mount would allow you to have the caliper welded on and you could use the mountainuni disk brake system… though no one has tried that configuration out yet. I am curious.
http://www.bizrate.com/bicycle-parts-accessories/oid1931090511.html
how much is mountain disk system?
Well, for rotor, spacers, bolts, weld on mount it’s $90. then you have to get it welded on for about $50. and then you would have to get that $20 spider and may have to get different axle spacers… and this would be an expiriment that hasn’t been tried before and may not work perfectly… I think you should hold onto your $ until I know it will work well.
i have the break setup including a disk
bicycle disk brakes come with a 6 bolt rotor to be attached to hubs. MountainUni rotors are made to attach to bicycle cranks on unicycles. We have been using Sinz bicycle cranks because they are offered in smaller sizes that are more desirable on unicycles. right now, I do not have a way of adapting your 6 bolt rotor to cranks. the placement of the bolts that hold the disk on are too close to the bearing housings and may scrape, therefore using conventional 110 BCD 5 bolt rotors work well. Ours is the only 110 BCD disk brake rotor to hit the market. It can be adapted to your cranks with the spider, but that’s never been tried before.
i am consdering trying it now
this is how it looks on my 29er, with a welded on caliper mount and sinz cranks:
you may have to take it to a bicycle shop, like a pro bmx shop to get the spacing on the axle right. do you do your own work?
yes i would do my own work
Ok. do you weld or do you have an auto shop nearby that can do the welding? as soon as the rotors are made we’ll make them available on the forum and you are welcome to purchase as much of the system that you need. any questions you have I will be glad to answer. you may even get some welding done at an area technical high school. thank you for your interest, I will let you know when we have stock as soon as we have them available.
these are 20 military grade stainless 1mm thick spacers that are produced to exacting standards. Unlikely to find anything like this at the hardware store or even a bike shop. 4 spacers go between each spider arm and rotor. they compensate for the difference between isis 8mm and 6mm spacers as well as any difference in spider arm alignment as well as spuare taper crank creep as they wear from repeated tightening. These spacers are as important to the system as the Sinz cranks, chain ring bolts, and the mount system weather weld on or bolt on types.
Once my bearing moved a bit and existing 4mm spacer was not enough, then I took a copper pipe and pipe cutter and prepared my own spacer that fits ideally. So I think this part is not that crucial.
possibly less so with your ISIS cranks, but more so with Schlumpf or square taper cranks. I have found that when I assembled the rotor with them I can take one out if the rotor rubs the pads because of the crank arm spider… the spider arms can be off a mm. we’re going to be selling them for as little as $8-10 for all 20. What brand is your unicycle, will you be welding on the caliper mount?
The spacers are critical to the reach of the bolt on, and can be removed if the cranks creep inward. you will use less with the bolt on and 6mm Isis crank stops, and even with a weld on, square taper cranks should have them too.
OK, I’ll see how it goes with the spacers. Still generally I prefer to have one spacer than four of them, but that I will handle myself when everything is in place.
And for the uni and mount type… you have already that data.
I understand. I have to assume that folks don’t know how to do things themselves, even though this is more of a do it yourself project! I just try to replicate what I know to work, I expect people to experiment and innovate with these kits. I hope to see success and not hear a bunch of “it didn’t work”… but I have faith in this crowd! please, use whatever spacers you like or what makes sense. if you weld on the mount, since you have isis the crank won’t move and you won’t even need spacers. if you got a bolt on though, you would. I’m just trying to be uniform for consistency’s sake. I can’t wait to see what you do with it!
I’ve just got info that this shop has Sinz 135mm on stock. Seems that other small sizes as well:
http://www.ebikestop.com/sinz_expert_crank_arm_set_isis_135mm-SEC-10.php
additionally there is special offer that if you buy for more than 99$ the shipping is free.
Unfortunately only to US, but maybe somebody will be interested in buying two crank sets.
I’m not buying myself because shipping to Europe is almost as expensive as the cranks. But it would be nice to have 135mm for my 29er.
I just called EBike Stop as well, and they only have one set in stock, and they get their inventory through the same supplier as I do. Unfortunately, unless we have a solid group who are interested in <155mm ISIS cranks, and I can commit to a large customer order 100 sets, we’re not ging to be able to have this as a length option.