Notices
Cyclocross and Gravelbiking (Recreational) This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like :The Dirty Kanza". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

GRX 2X10 question.

Old 10-22-19, 02:35 PM
  #1  
masi61
Senior Member
Thread Starter
 
masi61's Avatar
 
Join Date: Oct 2005
Location: SW Ohio
Posts: 2,308

Bikes: Puch Marco Polo, Saint Tropez, Masi Gran Criterium

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 484 Post(s)
Liked 33 Times in 29 Posts
GRX 2X10 question.

I’m thinking of just running 2x10 road gearing on my disc road bike that I’m building.

The reason is that the Industry 9 Torch rear hub is the previous version and not 11 speed road compatible. Apparently Shimano is making a “Tiagra” level 2x10 mechanical/hydraulic shifter set called the GRX ST-RX400. I don’t really see it for sale as a set although I do see where you can purchase a left and a right separately.

I’m curious if anyone knows the specifics of this GRX ST-RX400 set? I would be wanting to run a pretty typical 2x10 road setup such as a 52/36 mid compact crank and a 12-25 10-speed road cassette. Is this doable? I don’t really plan to do any real gravel riding but I need the functionality of the hydraulic mechanical shifters for hydraulic road disc and mechanical 2x10 road shifting.

Perhaps there is a a better option in a road hydraulic brake/mechanical shift 2x10?

Also, is anyone aware of any on-line retailers who might have a competitive price on the GR ST-RX400 shifter/brake caliper left/right set? I get the impression that this version might be for OEM to hit a certain price point. I just need some nice 10 speed road shifters since I’m building my wheelset around an Industry 9 Torch (mountain) hub in a 12x142 through axle disc road bike configuration where I will be limited th 28mm tires.

Thanks for any suggestions you all might have for me.
masi61 is offline  
Old 10-22-19, 02:55 PM
  #2  
wgscott
Occam's Rotor
 
Join Date: Jul 2013
Posts: 4,995
Mentioned: 61 Post(s)
Tagged: 0 Thread(s)
Quoted: 2366 Post(s)
Liked 268 Times in 166 Posts
First, are you aware you can run the most recent versions of 11-speed 105 and Ultegra cassettes on a 10-speed hub? You just leave the included spacer off.

The 10-speed version of GRX is 105-level. I think a large part of what GRX is supposed to provide is the option of smaller cranks (52/36 is not conventionally called mid-compact, fwiw), so if you don't have that need, you might be better off with an 11-speed 105 (or Ultegra) groupset.

universalcycles dot com and jensonusa dot com might be worth checking. I got my (11 speed) GRX crank there, which works fine with my otherwise Ultegra setup, FWIW. Be aware that GRX has a +3mm chainline relative to road cranks. If you are limited to 28 mm tires, you might not need that extra chainline. (I didn't need it with the same size hub and 40mm tires).
wgscott is offline  
Old 10-22-19, 02:56 PM
  #3  
dsaul
Senior Member
 
Join Date: Jan 2013
Posts: 1,215
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 312 Post(s)
Liked 79 Times in 61 Posts
If you don't need the gravel specific features of the GRX stuff, Shimano makes a Hydraulic Tiagra 4700 groupset that is 2x10.
dsaul is offline  
Old 10-22-19, 03:46 PM
  #4  
redlude97
Senior Member
 
Join Date: Sep 2011
Posts: 4,565
Mentioned: 28 Post(s)
Tagged: 0 Thread(s)
Quoted: 1876 Post(s)
Liked 145 Times in 101 Posts
Originally Posted by wgscott View Post
First, are you aware you can run the most recent versions of 11-speed 105 and Ultegra cassettes on a 10-speed hub? You just leave the included spacer off.
Only the 11-34 cassettes are compatible with a 10 speed hub
redlude97 is offline  
Old 10-22-19, 03:48 PM
  #5  
redlude97
Senior Member
 
Join Date: Sep 2011
Posts: 4,565
Mentioned: 28 Post(s)
Tagged: 0 Thread(s)
Quoted: 1876 Post(s)
Liked 145 Times in 101 Posts
Originally Posted by dsaul View Post
If you don't need the gravel specific features of the GRX stuff, Shimano makes a Hydraulic Tiagra 4700 groupset that is 2x10.
that is ugly as sin...
redlude97 is offline  
Old 10-22-19, 08:38 PM
  #6  
Chi_Z
Senior Member
 
Chi_Z's Avatar
 
Join Date: Dec 2013
Posts: 385

Bikes: Niner RLT 9 RDO

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 202 Post(s)
Liked 27 Times in 21 Posts
do you really need hydraulic disk when you are just road riding? TRP spyre works great.
Chi_Z is offline  
Old 10-22-19, 09:22 PM
  #7  
Bryan C. 
nothing to see here
 
Bryan C.'s Avatar
 
Join Date: Sep 2007
Location: Antioch, CA
Posts: 366
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 129 Post(s)
Liked 18 Times in 14 Posts
https://www.merlincycles.com/en-us/s...et-119887.html

Shimano R7020 for $600. As said earlier, the 11-34 cassette will work on a a 10 spd mtb hub.
Bryan C. is online now  
Old 10-23-19, 10:47 AM
  #8  
masi61
Senior Member
Thread Starter
 
masi61's Avatar
 
Join Date: Oct 2005
Location: SW Ohio
Posts: 2,308

Bikes: Puch Marco Polo, Saint Tropez, Masi Gran Criterium

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 484 Post(s)
Liked 33 Times in 29 Posts
Originally Posted by Chi_Z View Post
do you really need hydraulic disk when you are just road riding? TRP spyre works great.
My frame is designed with internal routing for hydraulic brake lines.
masi61 is offline  
Old 10-23-19, 10:50 AM
  #9  
masi61
Senior Member
Thread Starter
 
masi61's Avatar
 
Join Date: Oct 2005
Location: SW Ohio
Posts: 2,308

Bikes: Puch Marco Polo, Saint Tropez, Masi Gran Criterium

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 484 Post(s)
Liked 33 Times in 29 Posts
Originally Posted by Bryan C. View Post
https://www.merlincycles.com/en-us/s...et-119887.html

Shimano R7020 for $600. As said earlier, the 11-34 cassette will work on a a 10 spd mtb hub.

That痴 a good value on the groupset.

I知 not sure that the 11-34 eleven speed cassette that runs on a 10 speed freehub body is the direction I want to go.

I知 still wanting more info on the GRX 2 x 10 shifters.
masi61 is offline  
Old 10-23-19, 12:25 PM
  #10  
Bryan C. 
nothing to see here
 
Bryan C.'s Avatar
 
Join Date: Sep 2007
Location: Antioch, CA
Posts: 366
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 129 Post(s)
Liked 18 Times in 14 Posts
Originally Posted by masi61 View Post
That痴 a good value on the groupset.

I知 not sure that the 11-34 eleven speed cassette that runs on a 10 speed freehub body is the direction I want to go.

I知 still wanting more info on the GRX 2 x 10 shifters.
You can convert your hub to 11 speed road. Not cheap at $190

https://www.competitivecyclist.com/i...d-freehub-body
Bryan C. is online now  
Old 10-23-19, 05:19 PM
  #11  
Chi_Z
Senior Member
 
Chi_Z's Avatar
 
Join Date: Dec 2013
Posts: 385

Bikes: Niner RLT 9 RDO

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 202 Post(s)
Liked 27 Times in 21 Posts
Originally Posted by Bryan C. View Post
You can convert your hub to 11 speed road. Not cheap at $190

https://www.competitivecyclist.com/i...d-freehub-body
i know it is a boutique brand, but $190 for a piece of aluminum seems excessive, when similar freehub from DT Swiss is only $50
Chi_Z is offline  
Old 10-23-19, 10:46 PM
  #12  
Bryan C. 
nothing to see here
 
Bryan C.'s Avatar
 
Join Date: Sep 2007
Location: Antioch, CA
Posts: 366
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 129 Post(s)
Liked 18 Times in 14 Posts
Originally Posted by Chi_Z View Post
i know it is a boutique brand, but $190 for a piece of aluminum seems excessive, when similar freehub from DT Swiss is only $50
I was shocked to see that price too, it's stainless steel but still overpriced. Seems like all their drivers are $140+. Complete hubs run $350+.
Bryan C. is online now  
Old 10-26-19, 04:26 AM
  #13  
masi61
Senior Member
Thread Starter
 
masi61's Avatar
 
Join Date: Oct 2005
Location: SW Ohio
Posts: 2,308

Bikes: Puch Marco Polo, Saint Tropez, Masi Gran Criterium

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 484 Post(s)
Liked 33 Times in 29 Posts
Originally Posted by Bryan C. View Post
I was shocked to see that price too, it's stainless steel but still overpriced. Seems like all their drivers are $140+. Complete hubs run $350+.

Yeah, Maybe since the Torch hub has been updated, the retail outlets (Colorado Cyclist, Jensen USA) will put some of these desirable upgrade parts on clearance.

I notice that they sell a stainless steel freehub body shell. Is this so you swap all the parts from your original freehub body?
masi61 is offline  
Old 10-26-19, 09:14 AM
  #14  
Bryan C. 
nothing to see here
 
Bryan C.'s Avatar
 
Join Date: Sep 2007
Location: Antioch, CA
Posts: 366
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 129 Post(s)
Liked 18 Times in 14 Posts
Originally Posted by masi61 View Post
Yeah, Maybe since the Torch hub has been updated, the retail outlets (Colorado Cyclist, Jensen USA) will put some of these desirable upgrade parts on clearance.

I notice that they sell a stainless steel freehub body shell. Is this so you swap all the parts from your original freehub body?
The stainless freehub is more durable but heavier than the aluminum version. Swap the pawls and springs over, install the appropriate through axle end cap and you are good to go.

I would keep looking around, deals pop up every so often. You are right that with the release of the hydra hub that the torch stuff might become more budget friendly. But since you are looking for an 11 speed road freehub which isn't as common as the 10 spd or XD drivers it may be hard to find a deal.
Bryan C. is online now  
Likes For Bryan C.:
Old 11-13-19, 10:08 AM
  #15  
masi61
Senior Member
Thread Starter
 
masi61's Avatar
 
Join Date: Oct 2005
Location: SW Ohio
Posts: 2,308

Bikes: Puch Marco Polo, Saint Tropez, Masi Gran Criterium

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 484 Post(s)
Liked 33 Times in 29 Posts
Originally Posted by Bryan C. View Post
The stainless freehub is more durable but heavier than the aluminum version. Swap the pawls and springs over, install the appropriate through axle end cap and you are good to go.

I would keep looking around, deals pop up every so often. You are right that with the release of the hydra hub that the torch stuff might become more budget friendly. But since you are looking for an 11 speed road freehub which isn't as common as the 10 spd or XD drivers it may be hard to find a deal.
Thanks for your help. I actually pretty stoked about building these wheels up regardless of which cassette option I go with. Having the 6 pawls on a road hub sounds like a burly, durable option.
masi61 is offline  
Old 11-13-19, 02:48 PM
  #16  
mstateglfr 
Sunshine
 
mstateglfr's Avatar
 
Join Date: Aug 2014
Location: Des Moines, IA
Posts: 9,233

Bikes: '18 class built steel roadbike, '19 Fairlight Secan, '87 Schwinn Prelude, Black Mountain Cycles Monstercross V4, '89 Novara Trionfo, '18 Diamondback Syncr

Mentioned: 86 Post(s)
Tagged: 0 Thread(s)
Quoted: 3461 Post(s)
Liked 448 Times in 309 Posts
This might be the first time Ive read an entire group is being chosen based on a rear hub. Unique place to start.
mstateglfr is online now  
Old 11-13-19, 03:29 PM
  #17  
masi61
Senior Member
Thread Starter
 
masi61's Avatar
 
Join Date: Oct 2005
Location: SW Ohio
Posts: 2,308

Bikes: Puch Marco Polo, Saint Tropez, Masi Gran Criterium

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 484 Post(s)
Liked 33 Times in 29 Posts
Originally Posted by mstateglfr View Post
This might be the first time Ive read an entire group is being chosen based on a rear hub. Unique place to start.
I know, I知 odd. I知 very particular about hubs, and have built drivetrains out from a particular hub configuration as a starting point.

I love my Dura Ace 7400, 7403, and 7700 wheel sets. But this Industry 9 set just seems too cool to not build it.
masi61 is offline  
Old 11-14-19, 12:13 PM
  #18  
masi61
Senior Member
Thread Starter
 
masi61's Avatar
 
Join Date: Oct 2005
Location: SW Ohio
Posts: 2,308

Bikes: Puch Marco Polo, Saint Tropez, Masi Gran Criterium

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 484 Post(s)
Liked 33 Times in 29 Posts
Originally Posted by mstateglfr View Post
This might be the first time Ive read an entire group is being chosen based on a rear hub. Unique place to start.
Not sure , but playing designer on bike builds is just fun.

Here you can see the orange anodized wheel parts that I am quite certain will add visual punch to a matte grey titanium muted titanium disc compact road frame build:



The 6 bolt rotor mount allowed me to spec whatever rotors I wanted. I知 going to try these 鄭lpine ones I found.


Attached with classy looking titanium torx T25 bolts.


And here you see the Velocity Aileron rims just begging to be built up ASAP to the adjacent Industry 9 28f, 32r 12mm through axle hubs.
masi61 is offline  
Old 11-14-19, 03:54 PM
  #19  
chas58
Senior Member
 
chas58's Avatar
 
Join Date: Jul 2010
Location: Michigan
Posts: 3,909

Bikes: too many of all kinds

Mentioned: 35 Post(s)
Tagged: 0 Thread(s)
Quoted: 814 Post(s)
Liked 105 Times in 85 Posts
that blue and orange could come out sharp. Looking forward to seeing the build.

Probably nicer than this purdy $15K purple Titanium bike (I like the bike, but 15k?)
https://www.singletracks.com/mtb-new...r-than-gravel/
chas58 is offline  
Likes For chas58:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright ゥ 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.