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I got around to fitting my Hope tech V4’s to my 2022 Occam H30 tonight. The rear one is giving me a problem in that the spacing on the mounting holes appears to be ever so slightly too wide to get the calliper to sit correctly. Is it a differing standards issue or do I need some kind of adapter or is it just a badly made bike?
Will it fit correctly without the rotor?
Could be bike, caliper, or just both being at opposite ends of their tolerances. A rub of a file should sort it.
The pads are out, the calliper isn’t touching the rotor. I was tempted to take a file to it if it’s a tolerance thing, but I didn’t want to risk ruining it if it’s actually something else!
Pretty sure it's not a standards thing; I've fitted my V4s onto two different frames without issue. Any pictures?
Remove the front brake and fit the caliper to the rear for just a minute, that way you will know if your frame or the rear caliper is the issue
The calipers not touching the frme is it? The V4 caliper is huge. Aside that do the bolt holes/slots look fully formed on the caliper? Even hope isn't immune to CNC mistakes. Should be obvious if it's wrong.
The orbea website isn't much use is it, no photo gallery, no in depth info or service manuals to download that I can see, can't even find out the rotor or post mount size.
Have you got any adapters to test. Are the mounts standard or a bit weird, like between the stays instead of on top.
https://www.orbea.com/gb-en/support/manuals/blue-paper-occam-2020-en
I’ve not got an Occam but I do have a Rise, which is the e version of the same, and I do also have a V4 caliper here so might have a look later to see if there’s any clearance issues, I have V4 on front and E4 on back of mine.
No clearance issues and the brake fitted my Whyte 901 perfectly. I’ve had a look today and there are marks on inside of the original Shimano calliper mounting holes where they have had to force the bolt in. I’ve attacked the V4 with the Dremel and it’s much better but still not ideal.
Have you measured the bolt centers?
I don’t have the tools to measure the centres, only from edge to edge. It all depends on what tolerance is allowed for the post Mount standard.
You could possibly get new stays under warranty if the post mount is not 74mm, if you have to take a dremel to ever caliper you fit, voiding the warranty that can't be acceptable. Hambini has roasted Orbea over their terrible tolerances.
No warranty on the brakes sadly, they are at least five years old I’d guess. There must be a tolerance on the 74mm?
Edge to edge of the holes is fine, top edge-top edge or front edge to front edge, more accurate than hole centres. It wouldn’t be the first time that frame mountings are out! Measure with a ruler or tape. Hope this helps.
I’ve measured them with my digital micrometer. I’ll draw it up tomorrow when I get to work.
No warranty on the brakes sadly
Warranty may be out but Hope are very very helpful when it comes to their kit.
I recently had an issue with a very old and discontinued V2. Because they couldn't offer me seals for it, they gifted me a new pair of V2 calipers. My issue was a single caliper, and they sent me 2 replacements. I think if it had been any other brake manufacturer, I'd have been told Tough Luck, out of warranty - bye.
So give them a call or send an email explaining your problems and im sure they'll come up with some solution.
So I never thought it was a brake issue as the Hope fitted perfectly on my other bike.
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The only thing it can be is that the mounting holes (or one of them) is not straight causing the bolt to bind against the front of the calliper mounting hole as that's where the witness marks are on both callipers.
If the bike is under warranty I'd be getting the chainstay replaced. Are the mounting faces straight? If not I'd definitely try and get that sorted.
Otherwise you could fit an adapter to go up a disc size and modify that if needed rather than the the caliper.
I'd definitely bet on the frame's post mounts being off, seeing as your previous caliper is also marked. My comment was more about your future calipers not fitting and having to dremel them as well, sorry if I wasn't too clear. I had an alloy frame in the past with a brake issue, it had post mount holes slightly too far inboard, I basically couldn't push my caliper over any further, luckily the mounting slot on the caliper was just wide enough but a floating rotor was not compatible, it was only when i got a proper boost hub in the frame the problem reared its ugly head. I'm suprised there isn't more post mount issues out there.