Hope RX4 Caliper

[Jengaback]

The Hope RX4 flat-mount calipers can't be adapted down to 140mm and all you have to do is look at a photo to see why.

What about using rear flat mount caliper in front with an adapter bracket (bought separately, SRAM sells those), anyone tried that? Or front/rear FM calipers have a design feature that makes such a combination unusable?

This is very possible. For shimano the calipers are the same and its just the adaptor that changes. looking at the rear hope caliper if you had the front shimano or sram adaptor you could use it on the front

[TobinHatesYou]

This is very possible. For shimano the calipers are the same and its just the adaptor that changes. looking at the rear hope caliper if you had the front shimano or sram adaptor you could use it on the front

I don't see how this is possible.

A rear RX4 caliper already has a built in angle and height offset for 160mm rotors. You cannot take that offset away and therefore you cannot use a standard Shimano/SRAM front adapter on an RX4 caliper. It would be equivalent to using a Shimano/SRAM caliper with both a rear 160mm adapter and a front adapter.

[Klaster_1]

A rear RX4 caliper already has a built in angle and height offset for 160mm rotors.

A-ha, so FM RX4s are 160mm only, the official page and Bikerumor confirm that. I though that was the case for the front caliper only. For 140mm in the rear you'd have to use a PM caliper with a FM to PM adapter.

[PaulH]

I’m having problems with disc rub after fitting any tips for getting the pads to retract a bit more , done the business card trick etc shimano postmount, can’t get the pads to retract enough


Sent from my iPhone using Tapatalk

Sent from my iPhone using Tapatalk

[TobinHatesYou]

PaulH, I can only recount my horrible experience (and to an extent, my friend dvq's.) We both had issues with pistons getting sticky and not retracting fully. I had problems with multiple RX4 calipers where the same exact pistons would get stuck either from first installation or after a couple hundred miles. I was in contact with someone from Hope Tech USA for a couple weeks, but I guess eventually he figured I was lying about my problems and he stopped replying.

I've never had such a bad experience with a finished/shipping product before...such an incredibly bad experience and I'm back on SRAM calipers now.

Maybe one day Magura will make road calipers...

[morrisond]

I’m having problems with disc rub after fitting any tips for getting the pads to retract a bit more , done the business card trick etc shimano postmount, can’t get the pads to retract enough


Sent from my iPhone using Tapatalk

Sent from my iPhone using Tapatalk

Try slightly loosening the caliper mounting bolts and then spin the wheel - the rotor will hit the offending pad and move itself into alignment.

[PaulH]

Thanks I’ll give it a go


Sent from my iPhone using Tapatalk

[PaulH]

Sorted by following their YouTube video, the calipers have so much more power than the 785 I’ll report back after first ride tomorrow and see if I have any of the sticky piston problems.


Sent from my iPhone using Tapatalk

[Hexsense]

Rear flat mount looks good, i wonder if it has lower rear profile than a TRP spyre.
I have a bike that has an extremely tight space in rear triangle area. TRP Spyre fit in there but most other calipers hit the seatstay.
Hopefully this is a hydraulic alternative for my bike.

[Klaster_1]

I have a bike that has an extremely tight space in rear triangle area. TRP Spyre fit in there but most other calipers hit the seatstay.

My rear RX4 was a tight fit, the post mount eyelet closest to seatstay has almost no clearance to it.

[PaulH]

Been riding the hope rx4 for a couple of weeks now , so much better than shimano r785 lots more power and no rub.


Sent from my iPhone using Tapatalk

[Broady]

Good to hear, I'm just waiting on a R9170 lever then I'll get the LBS to order me some.

[onemanpeloton]

Sorry for the bump guys

Just received my shimano rx4s and found that the m5 fitting you need for the syringe tube isnt included

Whats more, i cant find anywhere to buy one. Help?!

[scale29]

Just call Hope in the morning, they'll answer your question in a few seconds. That's the advantage of Hope, you can pretty much talk to the person who made it if you ring up.

[PaulH]

I used the epic universal bleed kit it has all the bits you need , see amazon


Sent from my iPhone using Tapatalk