Hope Rx4+ calipers…
#1
Senior Member
Thread Starter
Join Date: Aug 2014
Location: UK
Posts: 765
Bikes: Dahon Jetstream p8 (sold), customized Dahon Helios x10, customzed Dahon Smooth Hound x11,customized Dahon Hammerhead 8.0 d7, Planet X Free Ranger (mullet setup 1x11), Planet X Giovanissimi 20 (1x9), Frog 52 (1x9) and Frog 48 1s
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 276 Post(s)
Liked 246 Times
in
182 Posts
Hope Rx4+ calipers…
Hi all,
I am currently running sram rival caliper with the 160 bracket setup. I have had 180 front disc with peak torque adaptor for the last 2 yrs but I want more power and less mounting brackets as stacked tolerance makes the caliper not true to disc (bigger pad clearance needed) so here is what I d like to do.
As the rival calipers are the same front and rear, I am thinking about a rx4+ flatmount +20 (setup for direct 160) which would go on the sram 140/160 mount bracket to buid up to 180. The sram bracket has the advantage of “side float adjustment” thanks to the elongated holes
Has this been tried?
Other option would be to get a rx4+ front direct mount +20 (design to work with 160 while being mounted straight to the fork) and fit it to the peak torque adaptor. This does not allows for as much lateral float as the 1st option.
What s your thoughts?
and yes, I have but pads (sintered ones)
edit:
peak torque adaptor : https://peak-torque.com/products/180...d-gravel-bikes
I am currently running sram rival caliper with the 160 bracket setup. I have had 180 front disc with peak torque adaptor for the last 2 yrs but I want more power and less mounting brackets as stacked tolerance makes the caliper not true to disc (bigger pad clearance needed) so here is what I d like to do.
As the rival calipers are the same front and rear, I am thinking about a rx4+ flatmount +20 (setup for direct 160) which would go on the sram 140/160 mount bracket to buid up to 180. The sram bracket has the advantage of “side float adjustment” thanks to the elongated holes
Has this been tried?
Other option would be to get a rx4+ front direct mount +20 (design to work with 160 while being mounted straight to the fork) and fit it to the peak torque adaptor. This does not allows for as much lateral float as the 1st option.
What s your thoughts?
and yes, I have but pads (sintered ones)
edit:
peak torque adaptor : https://peak-torque.com/products/180...d-gravel-bikes
Last edited by Fentuz; 05-15-24 at 01:55 PM.
#2
Thread Killer
Join Date: Aug 2008
Location: Ann Arbor, MI
Posts: 12,526
Bikes: 15 Kinesis Racelight 4S, 76 Motebecane Gran Jubilée, 17 Dedacciai Gladiatore2, 12 Breezer Venturi, 09 Dahon Mariner, 12 Mercier Nano, 95 DeKerf Team SL, 19 Tern Rally, 21 Breezer Doppler Cafe+, 19 T-Lab X3, 91 Serotta CII, 23 3T Strada
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 3218 Post(s)
Liked 1,764 Times
in
1,064 Posts
I can’t speak to all the jimmyed-up adapter stuff, but I do run RX4+ on Force levers and besides the action being good, reliability has been excellent over the past 3 or 4 years, so I can recco the Hopes from that standpoint.
#3
Senior Member
Join Date: Dec 2019
Location: South Shore of Long Island
Posts: 2,837
Bikes: 2010 Carrera Volans, 2015 C-Dale Trail 2sl, 2017 Raleigh Rush Hour, 2017 Blue Proseccio, 1992 Giant Perigee, 80s Gitane Rallye Tandem
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1110 Post(s)
Liked 1,050 Times
in
740 Posts
Going to point out that Columbus claims a max of 160mm for their forks, I think I'd sooner look into better pads and rotors to aid stopping before resorting to stacking pieces to exceed the standards of a fork.
#4
Senior Member
Join Date: Sep 2017
Posts: 8,094
Mentioned: 42 Post(s)
Tagged: 0 Thread(s)
Quoted: 7115 Post(s)
Liked 11,275 Times
in
4,812 Posts
And I'm trying to imagine why anyone would need rotors larger than 160mm on a gravel bike. If the brakes are set up properly, OP should not need larger rotors.
#5
Senior Member
Thread Starter
Join Date: Aug 2014
Location: UK
Posts: 765
Bikes: Dahon Jetstream p8 (sold), customized Dahon Helios x10, customzed Dahon Smooth Hound x11,customized Dahon Hammerhead 8.0 d7, Planet X Free Ranger (mullet setup 1x11), Planet X Giovanissimi 20 (1x9), Frog 52 (1x9) and Frog 48 1s
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 276 Post(s)
Liked 246 Times
in
182 Posts
But, i use my bike as a hard tail XC bike and when I go down 20% @ 40kph, I like to get strong bit and release (i brake on mtb as I do in race car).
the reason to go for 4 pots is mostly pad stability (like on my race car).
and if someone look at hope recommendation, it says 160/180 for involved gravel and XC. Since I race local XC races with my gravel, the bike is set up with XC transmission, 27.5x2.1 tyres and XC rotors… just a lighter drop bar XC…
similar set up as
Last edited by Fentuz; 05-21-24 at 02:40 AM.
Likes For Fentuz: