Hoba Posted November 23, 2017 Report Share Posted November 23, 2017 I got a Problem with the Installation of the rear axle on my inspired Fourplay. I install the axle, so it sits tight with the frame. (I litterally sit on the bike and tighten the axle, with both wheels on the floor) The problem is, when installed this way, the brake rotor interferes with the brake caliper vertically and i cant spin the wheel. If i loosen the axle ab bit on the nds and move it a bit further down, the rotor is free. (See picture) But im unsure if the wheel sits secure then... Inpired Fourplay 2011 Hope Mono Trials brakes with 180mm rotor (IS-Standard mount on the frame to IS-Mount on the Caliper. Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted November 23, 2017 Report Share Posted November 23, 2017 I've seen issues with 180 calipers and 183/185mm rotors before.Hard to tell from the photo which rotor you are running, but it'd be worth double checking the diameter as an easy start point. Quote Link to comment Share on other sites More sharing options...
Hoba Posted November 23, 2017 Author Report Share Posted November 23, 2017 Its an Shimano IceTec 180mm. Its exactly the size of the Hope Tech Trial 180 rotor i was running before. (same issue here) Quote Link to comment Share on other sites More sharing options...
ben_travis Posted November 23, 2017 Report Share Posted November 23, 2017 (edited) EDIT: Ignore my post, i see where your problem lies now... Edited November 23, 2017 by ben_travis Quote Link to comment Share on other sites More sharing options...
Hoba Posted November 23, 2017 Author Report Share Posted November 23, 2017 I've added another pic. Its the space square to the axle. I touches the top of the Brake caliper, so the wheel cannot spin if the axle is fully up to the frame. Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted November 23, 2017 Report Share Posted November 23, 2017 Cut bits of coke can and layer it up in your dropout? (Other fizzy drink manufactures are available) That'll lift your frame away from the bolts slightly to clear it. With that IS fitment, there's pretty much no other way, short of filing the outside of your disc or inside of your calliper. Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted November 23, 2017 Report Share Posted November 23, 2017 Btw, just check your retainer is properly engaging your pads. If they've slipped out, the pads may be rubbing because of that. Quote Link to comment Share on other sites More sharing options...
Hoba Posted November 23, 2017 Author Report Share Posted November 23, 2017 Okay, thank you. Ill try that. But why is that? Is the frame bent or something similar? Bought the Bike 2nd Hand though. Im playin with the idea of buy some Postmount brakes.. Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted November 23, 2017 Report Share Posted November 23, 2017 Shit quality control? My echo was exactly the same but I had post mount callipers so all I had to do was fire a wee washer under to raise it slightly. Quote Link to comment Share on other sites More sharing options...
Hoba Posted November 23, 2017 Author Report Share Posted November 23, 2017 Ill try the trick with some metal layer in the dropouts. Thank you for this info guys Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted November 23, 2017 Report Share Posted November 23, 2017 Obviously that method is full on ghetto, so what I'd suggest is, whatever you do to one side, do to the other. Don't want to be miss-aligning your back wheel (too much ). Quote Link to comment Share on other sites More sharing options...
grenosteve Posted November 23, 2017 Report Share Posted November 23, 2017 For a more long term fix, go to a local engineering shop and see if they can lathe the disk down a few mm. Not sure if it'll work with an icetec rotor though, it may de-laminate... Just thought, are you sure you have the right size axle/bolts in the hub? Like having a 10mm bolt in if the frames designed for 12mm... Quote Link to comment Share on other sites More sharing options...
Hoba Posted November 23, 2017 Author Report Share Posted November 23, 2017 I measured the dropouts, and its about 10mm. The 2 bolts, wich will be screw from both sides a slightly smaller , about 9.8mm. I think it the right size. I tried today layering some small metal plates in the dropouts, now the rotor isnt touching, but it is hard to get the wheel in and out. To alignin the brake caliper then is a tough job Quote Link to comment Share on other sites More sharing options...
Daviesdt Posted November 24, 2017 Report Share Posted November 24, 2017 (edited) Could you not get a couple of gromits knocked up to fit over the bolt where it sits in the drop outs? Although thinking about it it probably is just a more expensive way of doing Ross's ghetto coke can idea.... Edited November 24, 2017 by Daviesdt 1 Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted November 24, 2017 Report Share Posted November 24, 2017 Ahh, I see your problem! You're putting your bolts in the wrong way! 1 Quote Link to comment Share on other sites More sharing options...
Hoba Posted November 24, 2017 Author Report Share Posted November 24, 2017 2 hours ago, Daviesdt said: Could you not get a couple of gromits knocked up to fit over the bolt where it sits in the drop outs? Although thinking about it it probably is just a more expensive way of doing Ross's ghetto coke can idea.... what is a Gromit? Like a bushing? Quote Link to comment Share on other sites More sharing options...
grenosteve Posted November 24, 2017 Report Share Posted November 24, 2017 https://www.tartybikes.co.uk/disc_brake_rotors/hope_mono_trial/c76p24.html Mono Trial disks can come in 175mm. Are sure the calliper isn't designed for that size rotor? Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted November 24, 2017 Report Share Posted November 24, 2017 This exact issue is why we got some 175s done (it's a custom size) Quote Link to comment Share on other sites More sharing options...
Hoba Posted November 24, 2017 Author Report Share Posted November 24, 2017 Oh sh... This could be the problem I bought the bike 2nd hand and had an 180mm hope rotor installed. How can i tell what type of caliper im running? there is only the Hope icon and a 3 written on it. And of course, no one has a 175mm rotor in stock Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted November 24, 2017 Report Share Posted November 24, 2017 It's a Hope #3 caliper, for 180 rotor. The 175 rotor is a custom size, nobody will have it in stock. Other option is to file the threads off the bolts for the section that goes inside the frame, this will allow you to lift the caliper up a little - usually does the trick. Quote Link to comment Share on other sites More sharing options...
Hoba Posted November 24, 2017 Author Report Share Posted November 24, 2017 Okay thank you. So my rotor an caliper are matching. Ill try to file down the bolts a little, and see if this does the trick Quote Link to comment Share on other sites More sharing options...
grenosteve Posted November 24, 2017 Report Share Posted November 24, 2017 Adam, Would hope knock out a one-off custom rotor if required? Probably the best solution for Hoba if it's possible... Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted November 24, 2017 Report Share Posted November 24, 2017 Probably not any more sadly, could be worth a try though. Quote Link to comment Share on other sites More sharing options...
monkeyseemonkeydo Posted November 25, 2017 Report Share Posted November 25, 2017 I think I'd be taking the rotor to a grinding wheel and whipping off a bit of material to get it to clear. That or open up the dropouts and adding a bushing on the screw to suit and drop the axle in the frame a little to move the rotor down in the caliper. Quote Link to comment Share on other sites More sharing options...
Hoba Posted November 25, 2017 Author Report Share Posted November 25, 2017 Ive tried the trick adam has written before. Filed some shimano disk adaptor bolts down. Now the rotor clears the Caliper ever so slightly I'll go for a test ride tommorow and see how it works. Quote Link to comment Share on other sites More sharing options...
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