Go Back  Bike Forums > Bike Forums > Cyclocross and Gravelbiking (Recreational)
Reload this Page >

Need help with TRP Spyre on Fork (can't fit 160mm rotor)

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.

Need help with TRP Spyre on Fork (can't fit 160mm rotor)

Old 10-19-14, 04:37 PM
  #1  
xtrykr
Junior Member
Thread Starter
 
Join Date: Jul 2014
Posts: 14

Bikes: Marin San Anselmo Hybrid (Retired)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Need help with TRP Spyre on Fork (can't fit 160mm rotor)

Hiya all, I have a carbon fork with 74mm post mount, and purchased a TRP Spyre. The Mount holes lines up perfectly, but the problem I am running into is that the caliper when mounted on the fork seems to only accommodate a 140mm rotor. With the 160mm rotor that I purchased, there is about a 10mm gap between the mount points. Can someone direct me to an adapter that would allow me to bridge this gap while ensure it is secure? Or, can I just use a longer screw and use spacers/shimmy it? Thanks in advance.

Last edited by xtrykr; 10-19-14 at 07:41 PM.
xtrykr is offline  
Old 10-19-14, 11:24 PM
  #2  
Andy_K 
Senior Member
 
Andy_K's Avatar
 
Join Date: Jan 2008
Location: Beaverton, OR
Posts: 12,142

Bikes: Yes

Mentioned: 301 Post(s)
Tagged: 0 Thread(s)
Quoted: 1783 Post(s)
Liked 51 Times in 43 Posts
I think this is what you need:

TRP
__________________
My Bikes

Last edited by Andy_K; 10-19-14 at 11:28 PM.
Andy_K is offline  
Old 10-20-14, 04:29 AM
  #3  
bdcheung
Carpe Diem
 
bdcheung's Avatar
 
Join Date: Sep 2006
Location: MABRA
Posts: 13,149

Bikes: 2007 CAAD9; 2014 CAADX; PedalForce CG1

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Andy_K View Post
I think this is what you need:

TRP
+1
__________________
"When you are chewing the bars at the business end of a 90 mile road race you really dont care what gear you have hanging from your bike so long as it works."
ΛΧΑ ΔΞ179 - 15% off your first Hammer Nutrition order!
bdcheung is offline  
Old 10-20-14, 10:16 AM
  #4  
xtrykr
Junior Member
Thread Starter
 
Join Date: Jul 2014
Posts: 14

Bikes: Marin San Anselmo Hybrid (Retired)

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks guys, unfortunately, it appears this adapter has been sold out for a while :S

Can I use the Shimano XTR post to post mount? Shimano XTR Mount Adaptor Front Post to Post | Chain Reaction Cycles
xtrykr is offline  
Old 10-20-14, 11:06 AM
  #5  
Andy_K 
Senior Member
 
Andy_K's Avatar
 
Join Date: Jan 2008
Location: Beaverton, OR
Posts: 12,142

Bikes: Yes

Mentioned: 301 Post(s)
Tagged: 0 Thread(s)
Quoted: 1783 Post(s)
Liked 51 Times in 43 Posts
You can use adapters from other brands. I'm reluctant to endorse the one you linked to without qualification because it says it's for mounting a 180mm caliper, but that may be assuming a 160mm post mount standard. It seems that 140mm post mounts are a relatively new thing and it may be that product labeling just hasn't caught up. It's also possible that an adapter such as you linked to would be slightly sub-optimal.

In this case I would suggest talking to a mechanic at an LBS so the person advising you can stand behind the information they provide and support you through the process of getting things up and running, even if you do the actual installation yourself. If you don't have a convenient LBS near by, consider buying from an online retailer that will provide live technical assistance, such as Universal Cycles (which I can tell you first hand is a real brick-and-mortar store with qualified mechanics). In either case, the first person you talk to is likely to be a floor salesperson who doesn't know any more than you do, but they should be happy to refer you to a mechanic once you explain the subtlety of the problem.

Alternatively, if you re-post this on the mechanics subforum here you'll probably get a good answer, although I'd bet that a few people there would tell you it's best to take it to someone who can see your fork and brake in person.
__________________
My Bikes
Andy_K is offline  
Old 10-20-14, 01:58 PM
  #6  
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 41,396

Bikes: 8

Mentioned: 188 Post(s)
Tagged: 0 Thread(s)
Quoted: 6907 Post(s)
Liked 240 Times in 198 Posts
Originally Posted by xtrykr View Post
Hiya all, I have a carbon fork with 74mm post mount, and purchased a TRP Spyre. The Mount holes lines up perfectly, but the problem I am running into is that the caliper when mounted on the fork seems to only accommodate a 140mm rotor. With the 160mm rotor that I purchased, there is about a 10mm gap between the mount points. Can someone direct me to an adapter that would allow me to bridge this gap while ensure it is secure? Or, can I just use a longer screw and use spacers/shimmy it? Thanks in advance.

this is ISO to post mount, As the holes in the caliper are .. ... Post mount to Post Mount, is another game entirely ..

there maybe stacks of V brake paired washers* will do , Avid already designed their brakes that way , it offers some self alighnment
if you hold the brake on, gripping the disc, and then tighten the bolts..
then you are moving the whole caliper out on Longer bolts

* these go on the brake pad posts and usually have 1 thick & 1 thinner cupped alloy washer and 2 steel domed washers


In so far as most , same adapter , because of how the frames are designed is 1 size larger on the front than the rear .

Hence they are Marked 140r/160f, 160/180, 180/210 .. So, for 2 wheels to both be 160, for example, you need 2 different adapters .

NB as ISO (to Post Mount) is a Standard,, Any Adapter that has the numbers ^above^ will Do..

It Doesn't Have to Come from TRP wbsite.

Hit your LBS and ask. Many have a bin with extra Adapters in it it just has to be the 160f/140r type.

perhaps even other brands of Post Mount-Post Mount adapters can be sourced.

Last edited by fietsbob; 10-20-14 at 03:03 PM.
fietsbob is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
CrowSeph
Classic & Vintage
0
07-18-18 06:06 AM
PeregrineA1
Classic & Vintage
21
02-26-17 06:08 PM
benjdm
Advocacy & Safety
30
06-27-11 10:48 PM
VA_Esquire
"The 33"-Road Bike Racing
9
07-02-09 12:35 PM
TandemGeek
Tandem Cycling
0
04-27-06 04:30 PM

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