N.Wood Posted April 25, 2014 Report Share Posted April 25, 2014 Hello fellow trialsters. Just bought some Trialtech sport lite forks to go with my ancient mono trials caliper and try-all H front hub. I am using a Hope adaptor to bring the rotor size up to 200mm. The forks are faced, the adaptor is brand new. I have just taken off a set of trialtech sports which were fine. However, with everything bolted up tight and no spacers anywhere, the caliper is too far inboard and theres not a lot I can do about it. Anyone had this problem before? Quote Link to comment Share on other sites More sharing options...
bing Posted April 25, 2014 Report Share Posted April 25, 2014 You got any pictures dude? From my experience of is mount calipers I've had to shim it out to get the disk in the centre of the caliper. If it's the other way where it can't be shimmed, the machining a minute amount from the face of the adaptor may get round it. But it'll have to be flat or the caliper won't sit square Quote Link to comment Share on other sites More sharing options...
N.Wood Posted April 25, 2014 Author Report Share Posted April 25, 2014 Added pics Quote Link to comment Share on other sites More sharing options...
bing Posted April 25, 2014 Report Share Posted April 25, 2014 (edited) Simples. Push the pads all the way back into the caliper, then add a shim between the fork leg and the adaptor (both bolts) until the rotor is in the centre of the caliper, usually washers will do the trick. Then pump the lever until the pistons self centre again. That's all I did and mine worked with no trouble and no rubbing Edited April 25, 2014 by bing Quote Link to comment Share on other sites More sharing options...
N.Wood Posted April 25, 2014 Author Report Share Posted April 25, 2014 Adding a spacer anywhere will push the caliper further inboard making it worse? Look at the last pic. Quote Link to comment Share on other sites More sharing options...
isitafox Posted April 25, 2014 Report Share Posted April 25, 2014 Looks like somethings twisted somewhere, am I right that at the bottom the non driveside of the caliper is nearly touching and at the top the driveside is nearly catching? Quote Link to comment Share on other sites More sharing options...
N.Wood Posted April 25, 2014 Author Report Share Posted April 25, 2014 My first thought was the caliper was twisted (never been hit hard dispite what the borecap looks like, but is ancient) and it may well be, but its nearly touching on both upper and lower NDS Quote Link to comment Share on other sites More sharing options...
isitafox Posted April 25, 2014 Report Share Posted April 25, 2014 Only thing I could suggest is filing a bit from the inside of the adaptor to pull the caliper out slightly though it sounds a bit dodgy. I've got a post mount trialzone on mine and that sits pretty central in the PM-IS adaptor. Quote Link to comment Share on other sites More sharing options...
N.Wood Posted April 25, 2014 Author Report Share Posted April 25, 2014 Yeah thats the plan for tomorrow. Don't have access to any milling machines (I'm not from the north ) so a file will have to do. Looks like taking about 1.5mm off will put it central. If it doesn't work I'll just buy a new brake. Quote Link to comment Share on other sites More sharing options...
MartMini Posted April 25, 2014 Report Share Posted April 25, 2014 spacer in-between the fork and hub spacer, will push the calliper away from the disk? Quote Link to comment Share on other sites More sharing options...
dann2707 Posted April 25, 2014 Report Share Posted April 25, 2014 spacer in-between the fork and hub spacer, will push the calliper away from the disk? Sadly not dude. Quote Link to comment Share on other sites More sharing options...
MartMini Posted April 25, 2014 Report Share Posted April 25, 2014 explain? surely if you put a washer on the hub axle, in-between the fork leg and hub spacer, it'd push the fork leg out (and therefore the caliper) away from the disk? Quote Link to comment Share on other sites More sharing options...
dann2707 Posted April 25, 2014 Report Share Posted April 25, 2014 Shit, my bad I keep looking at that middle pic, the two don't really coincide with each other unless its lighting as the 2nd and last pic kind of clash with each other! But yeah I get you, although wouldn't the fork come out at strange angle = pads not hitting square on = gash as brake. Quote Link to comment Share on other sites More sharing options...
MartMini Posted April 25, 2014 Report Share Posted April 25, 2014 I see where your coming from. surely you'd only be talking a few degrees? which the pads would wear into? imo, would be woth a try and seeing how bad it'd be before getting the file out and modifying shit! Quote Link to comment Share on other sites More sharing options...
N.Wood Posted April 25, 2014 Author Report Share Posted April 25, 2014 Looking again it seems like although the whole lot is too far inboard, something is twisted as the rotor doesn't run straight through the caliper, with a bit of a gap between rotor and pad at the back and not much at the front. Have I done gone twisted my caliper? It's not cracked, cleaned it all yesterday. Goddamn. Thought I got over this snapping caliper business after switching to Hope. Maybe not. Quote Link to comment Share on other sites More sharing options...
bing Posted April 25, 2014 Report Share Posted April 25, 2014 Thought I'd never say this, but I'd have a bb7 any day now, after having one on my new 24 and its brutal. Better than a saint. It just works with no messing about. Cba messing with hydraulics anymore Quote Link to comment Share on other sites More sharing options...
N.Wood Posted April 25, 2014 Author Report Share Posted April 25, 2014 I used to swear by a BB7 but I snapped 2 calipers and wrote off 2 rotors in the process and couldn't be arsed any more. Quote Link to comment Share on other sites More sharing options...
dngr2self Posted April 25, 2014 Report Share Posted April 25, 2014 (edited) spacer in-between the fork and hub spacer, will push the calliper away from the disk?This is what I've done in the past and it was fine. Edited April 25, 2014 by dngr2self Quote Link to comment Share on other sites More sharing options...
craigjames Posted April 25, 2014 Report Share Posted April 25, 2014 Looking again it seems like although the whole lot is too far inboard, something is twisted as the rotor doesn't run straight through the caliper, with a bit of a gap between rotor and pad at the back and not much at the front. Have I done gone twisted my caliper? It's not cracked, cleaned it all yesterday. Goddamn. Thought I got over this snapping caliper business after switching to Hope. Maybe not. Could it be the fork mount is welded incorrectly? Had a few forks like when I used to run a disc, Joe McGrew's Bonz post mount forks needed modding to get his post mount Hope to fit and to allow the rotor bolts to clear. Quote Link to comment Share on other sites More sharing options...
N.Wood Posted April 25, 2014 Author Report Share Posted April 25, 2014 Potentially, though tarty faced it and i'd guess it'd be relitively obvious if it was all dwagged when faced? Looks like the facing is paralell, didnt bore an uneven hole or anything. Quote Link to comment Share on other sites More sharing options...
bike_dummie Posted April 25, 2014 Report Share Posted April 25, 2014 http://www.chainreactioncycles.com/mobile/hope-rotor-spacer/rp-prod3288 - maybe try these? Quote Link to comment Share on other sites More sharing options...
wilf Posted April 25, 2014 Report Share Posted April 25, 2014 Yeah I've had the problem before using the same +20mm adaptors, they can sometimes set the caliper out of line. If you have a spare 180mm rotor try that and see if the problem still occurs. 1 Quote Link to comment Share on other sites More sharing options...
HippY Posted April 25, 2014 Report Share Posted April 25, 2014 I had the same problem with these adaptors on the rear Left pad was rubbing I am not sure what you can do about it Quote Link to comment Share on other sites More sharing options...
harmertrials Posted April 26, 2014 Report Share Posted April 26, 2014 Thought I'd never say this, but I'd have a bb7 any day now, after having one on my new 24 and its brutal. Better than a saint. It just works with no messing about. Cba messing with hydraulics anymore Not really a dig Dan but you seem to rant and rave about whatever part you own at the time. Quote Link to comment Share on other sites More sharing options...
super Posted April 26, 2014 Report Share Posted April 26, 2014 In theory: If it fits with no adaptor and a 180mm disc - it's the adaptor. If it fits on another pair of forks with the adaptor - it's the fork disc mount. If it doesn't fit either - it's the caliper. If you can be bothered to try all the options, then at least you know if you need to send the forks back. Quote Link to comment Share on other sites More sharing options...
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