Chris Posted July 6, 2006 Report Share Posted July 6, 2006 I'm planing to switch to a disc on the rear and I was wondering which rim I should go for. Standard 32 hole rim or 36? Does it make much of a difference having 4 more spokes? I don't know how much it would increase the stiffness of the wheel.If 36 is the better choice, I'd get a tryall 47mm, as the new ECHO rims are not available with 36 holes...btw, what do you think about this disc tap, compared to others you've seen? It's on the MBK T1000 frame.And which disc would you go for? I'd say the hope mono trial 180mm is fine. But what about the Hope mono m4? It has a four piston caliper, whereas the trial has only 2. But from the looks the pistons on the mono trial seem to be bigger, meaning more power? The only negative thing about the mono trial is that it's limited to a 180mm rotor. The mono m4 also comes with a 200mm caliper. So which one is stronger? Mono m4: 4 pistons + 200mm rotor or mono trial: 2 larger (?) pistons + 180mm rotor? Quote Link to comment Share on other sites More sharing options...
Hobnobs Posted July 6, 2006 Report Share Posted July 6, 2006 Mount doesnt look amazingly strong, maybe the KOT would be a better choice, ive heard good things.Mono trial is the only option, 180mm rotor is powerfull enough with that brake. Quote Link to comment Share on other sites More sharing options...
adamtrials Posted July 6, 2006 Report Share Posted July 6, 2006 I would think the mount could be alright with it having that extra bar.I think the mono trial will be better, the m4 has more modulation but is heaverand less "on/off" Quote Link to comment Share on other sites More sharing options...
Chris Posted July 6, 2006 Author Report Share Posted July 6, 2006 (edited) I just had a look at tartybikes. The 180mm mono trial caliper is the same for front and rear? The MBK frame features a +20mm mount, so I can take the 180mm caliper and run a 200mm rotor? That would be awesome and I guess it would be better than the mono m4 with a 200mm rotor. Edited July 6, 2006 by Chris Quote Link to comment Share on other sites More sharing options...
adamtrials Posted July 6, 2006 Report Share Posted July 6, 2006 Yes, that is right. MBK's are awesome frames, i'm considering getting one. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted July 6, 2006 Report Share Posted July 6, 2006 Hey Chris,I'd recommend 36h. If you're building a dual disc bike, I think the best way to go about it is decide the rear end components around the disc - this is the only way to make it work to its full potential. So, 36h for the rear wheel. Plain gauge spokes too if you'd like to add a little stiffness.The MBK disc mount is very tough from what I've seen so far. One of our customers is using one with no problems as yet. The KOT has a great disc mount too. Another option would be the Simtra ST-1 if the geometry allows (which I believe I already spoke to you about)...The Mono Trial is much better for trials than the Mono M4. Its all about piston ratios. Despite the M4 having 4 pistons, the overall leverage ratio between the slave and master pistons is much smaller, meaning less power and lock. The large holes in the Mono Trial rotor also allow the pads to clamp the edges of the holes really well.The picture of that caliper is something I may need to change the annotation of actually - it actually means 'Rear' OR '180mm Front'. Due to the way IS mounts have been standardised, the same caliper run on the front of a bike requires a 20mm larger rotor than on the rear. In short - without any adaptors, the largest Mono Trial rotor you can run on the rear of a KOT or MBK is 180mm. (The Simtra however can fit a 200).There's a few pics and vids of my bike floating about Chris, if you need links just shout CheersAdam Quote Link to comment Share on other sites More sharing options...
Chris Posted July 6, 2006 Author Report Share Posted July 6, 2006 Thanks Adam, you're the enzyclopedia of trials hahaha I've seen the pics and vids of your bike. I love the smoothness!Too bad... I thought I could run a 200m rotor with the mono trial... I hope the 180mm rotor is strong enough. And I hope to be able to buy the frame soon.. just have to sell my xtp frame :/ Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted July 6, 2006 Report Share Posted July 6, 2006 I hope the 180mm rotor is strong enough.I'm pretty sure it will be! I weight approx 95kg and my brake is really good. There's another small vid here if you haven't seen it: http://www.trials-forum.co.uk/forum/index....showtopic=73974 (including a 'boon' up a steep slope which shows how nicely the brake holds).CheersAdam Quote Link to comment Share on other sites More sharing options...
Chris Posted July 6, 2006 Author Report Share Posted July 6, 2006 (edited) Cool, I'm about 20kg less I think - I'm a skinny guy btw, that bail was kind of funny... crawling on the ground like a baby Edited July 6, 2006 by Chris Quote Link to comment Share on other sites More sharing options...
Rich Pearson Posted July 6, 2006 Report Share Posted July 6, 2006 180mm is definately strong enough. 200mm would be over kill. 200 takes about a year anda day to bed in, the modualtion is shocking adn the power is almost uncontrolable. 180 is the szhizzle (or so I've found.)My setup is (almost identicle to Adams) Mono trial, hope +20 (making 180) 36h rear rim and that works awesome. Are you actually looking to buy a disc frame? As I do have a Leeson prototype that needs a new home....Rich Quote Link to comment Share on other sites More sharing options...
Chris Posted July 6, 2006 Author Report Share Posted July 6, 2006 Yea, but I think I'll go for a MBK or KOT. Not sure about that though... Quote Link to comment Share on other sites More sharing options...
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