Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Fifty Plus (50+) Share the victories, challenges, successes and special concerns of bicyclists 50 and older. Especially useful for those entering or reentering bicycling.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 12-01-17, 05:11 PM   #1
jppe
Let's do a Century
Thread Starter
 
jppe's Avatar
 
Join Date: Oct 2004
Location: North Carolina
Bikes: Pinarello Prince/Campy SR; Cervelo R3/Sram Red; Trek 5900/Duraace, Cervelo P2C/Duraace, Cannondle Tandem/Ultegra
Posts: 6,892
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 150 Post(s)
What Rotors are you choosing for hydraulic brakes??

Iím building up my new gravel bike.......Iím learning how much I need to learn!!!

My wheel builder suggests center lock vs 6 bolt. Looks like I need 160s. What make has been your preference?
jppe is offline   Reply With Quote
Old 12-01-17, 05:37 PM   #2
RockiesDad
Senior Member
 
Join Date: Oct 2015
Location: Bay Area, CA
Bikes:
Posts: 245
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 120 Post(s)
Pricing is all over the place. Anywhere from a few bucks to about $50 per rotor. Stick to name brands and you can't go wrong. Personally I went with TRP standard rotors for my second set of wheels because that was what my first wheel set came with. Also, I think there are more choices with 6 bolt pattern than with center lock but then again it depends on what hubs you get. No bad choices here...
RockiesDad is offline   Reply With Quote
Old 12-02-17, 11:04 AM   #3
TimothyH
- Soli Deo Gloria -
 
TimothyH's Avatar
 
Join Date: Aug 2015
Location: Northwest Georgia
Bikes: 2017 Niner RLT 9 RDO, 2015 Bianchi Pista, 2002 Fuji Robaix
Posts: 8,482
Mentioned: 95 Post(s)
Tagged: 0 Thread(s)
Quoted: 3446 Post(s)
Let your choice of wheels drive the decision to go with centerlock or 6-bolt.

There is nothing wrong with 6-bolt but I would go with centerlock if your choice of wheels have that option. My wheels only came with 6-bolt hubs and so that's what I went with.

Either way, Shimano Ice Tech rotors are very good quality.
  • SM-RT81 is the 160 mm centerlock XT level rotor.
  • MS-RT86 is the 160 mm 6-bolt XT level rotor. This is what I have on my Niner.
  • SM-RT99 is the XTR level centerlock rotor. Sweet, but expensive.


-Tim-
TimothyH is offline   Reply With Quote
Old 12-02-17, 11:08 AM   #4
Marcus_Ti 
Furry Cruise Missile
 
Marcus_Ti's Avatar
 
Join Date: Sep 2014
Location: Lincoln, Nebraska
Bikes: Roadie: Seven Axiom Race Ti w/Chorus 11s. CX/Adventure: Carver Gravel Grinder w/ Di2
Posts: 3,018
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 970 Post(s)
The more mountainous the terrain, the more you stand to benefit from bigger and fancier, and more expensive rotors. Being in a state that ends with "Carolina" I'll wager you fit the bill.

With Campag endorsing Shimano Centerlock (sounds really odd don't it)...I suspect CL is the way of the future. Lots of great rotors for CL like Shimano IceTech.
Marcus_Ti is offline   Reply With Quote
Old 12-02-17, 12:25 PM   #5
Maelochs
Senior Member
 
Maelochs's Avatar
 
Join Date: Oct 2015
Bikes: 2015 Workswell 066, 2014 Dawes Sheila, 1983 Cannondale 500, 1984 Raleigh Olympian, 2007 Cannondale Rize 4, 2017 Fuji Sportif 1 LE
Posts: 7,329
Mentioned: 52 Post(s)
Tagged: 0 Thread(s)
Quoted: 2839 Post(s)
I went with Shimano, because ... Shimano, and 6-bolt because of my wheels. Not sure why people prefer Center-lock ... stronger, lighter, simpler? But I didn't do any research because wheels cost a lot more than rotors.
Maelochs is offline   Reply With Quote
Old 12-02-17, 12:58 PM   #6
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 8
Posts: 30,007
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
Quoted: 3460 Post(s)
I use Avid discs* , but Magura / Galfer discs are thicker..

* a 6 bolt with a CenterLock adapter 160 on front , a 4 bolt Rohloff disc , another 160, on the back.. Avid costs less .


Advantage? It's a Bike Friday , so to keep the disc from getting bent, when packed in the suitcase, to go touring someplace,

the disc comes off with a lock ring, to be packed separately..

a benefit for other bikes used for adventure touring not a loop from and back to your front door.








....

Last edited by fietsbob; 12-02-17 at 01:05 PM.
fietsbob is offline   Reply With Quote
Old 12-02-17, 01:28 PM   #7
twodownzero
Senior Member
 
Join Date: Oct 2011
Location: New Mexico
Bikes: Surly Disc Trucker, Ribble Nero Corsa
Posts: 842
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 179 Post(s)
I am interested in the opinions of others here about which rotors are the most true out of the box. I have trued my Avid BB7 rotors so many times and I have one that just won't stop rubbing no matter how much time and effort I put into it.
twodownzero is offline   Reply With Quote
Old 12-02-17, 02:11 PM   #8
Marcus_Ti 
Furry Cruise Missile
 
Marcus_Ti's Avatar
 
Join Date: Sep 2014
Location: Lincoln, Nebraska
Bikes: Roadie: Seven Axiom Race Ti w/Chorus 11s. CX/Adventure: Carver Gravel Grinder w/ Di2
Posts: 3,018
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 970 Post(s)
Quote:
Originally Posted by Maelochs View Post
I went with Shimano, because ... Shimano, and 6-bolt because of my wheels. Not sure why people prefer Center-lock ... stronger, lighter, simpler? But I didn't do any research because wheels cost a lot more than rotors.
5 fewer fasteners to loctite and torque.
Marcus_Ti is offline   Reply With Quote
Old 12-02-17, 06:36 PM   #9
TimothyH
- Soli Deo Gloria -
 
TimothyH's Avatar
 
Join Date: Aug 2015
Location: Northwest Georgia
Bikes: 2017 Niner RLT 9 RDO, 2015 Bianchi Pista, 2002 Fuji Robaix
Posts: 8,482
Mentioned: 95 Post(s)
Tagged: 0 Thread(s)
Quoted: 3446 Post(s)
Quote:
Originally Posted by Marcus_Ti View Post
The more mountainous the terrain, the more you stand to benefit from bigger and fancier, and more expensive rotors. Being in a state that ends with "Carolina" I'll wager you fit the bill.

There is a big difference between the mountains of Western North Carolina and the coastal plain. Driving from Interstate 95 in the middle of the state east to Wilmington on the coast is as flat as any place in Florida.

The same is true for mountainous North Georgia vs the flat lands south of the Gnat Line.


-Tim-
TimothyH is offline   Reply With Quote
Old 12-03-17, 05:45 PM   #10
BlazingPedals
Senior Member
 
BlazingPedals's Avatar
 
Join Date: Dec 2004
Location: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, homebuilt recumbent
Posts: 10,046
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 531 Post(s)
Quote:
Originally Posted by twodownzero View Post
I am interested in the opinions of others here about which rotors are the most true out of the box. I have trued my Avid BB7 rotors so many times and I have one that just won't stop rubbing no matter how much time and effort I put into it.
Avids only move the outside pad, so full braking DEPENDS on bending the rotor. The more space you have between the rotor and the inner pad, the more the rotor deflects, and the more often you'll have to true it up. Don't get the thicker rotors, but maybe the 'floating' rotors will work better.
BlazingPedals is offline   Reply With Quote
Old 12-03-17, 09:33 PM   #11
twodownzero
Senior Member
 
Join Date: Oct 2011
Location: New Mexico
Bikes: Surly Disc Trucker, Ribble Nero Corsa
Posts: 842
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 179 Post(s)
Quote:
Originally Posted by BlazingPedals View Post
Avids only move the outside pad, so full braking DEPENDS on bending the rotor. The more space you have between the rotor and the inner pad, the more the rotor deflects, and the more often you'll have to true it up. Don't get the thicker rotors, but maybe the 'floating' rotors will work better.
I don't need thicker rotors; I need FLATTER rotors.

I trued them again today. They're not quite as tight as I wish they could be, but life isn't perfect. They're no longer rubbing...for the time being. I only needed one tiny tweak, but of course I don't take my rotor truing tool on 75 mile rides.
twodownzero is offline   Reply With Quote
Old 12-04-17, 07:19 AM   #12
BlazingPedals
Senior Member
 
BlazingPedals's Avatar
 
Join Date: Dec 2004
Location: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, homebuilt recumbent
Posts: 10,046
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 531 Post(s)
Quote:
Originally Posted by twodownzero View Post
I don't need thicker rotors; I need FLATTER rotors.
The point being, thicker ones are going to be stronger and less susceptible to bending. Which will make your brakes less effective. Some rotors are on a carrier, and allow the rotor to float. They may be able to move and let your brakes develop their full power and still not bend. Or, you could replace the BB7. Hydraulics move both pads and won't bend your rotors. If you want to stick with mechanicals, TRP Spyre/Spyke do the same.
BlazingPedals is offline   Reply With Quote
Old 12-04-17, 07:44 AM   #13
Robert C
Senior Member
 
Robert C's Avatar
 
Join Date: Sep 2006
Location: Salt lake, UT
Bikes: This list got too long: several Ďbents, an urban utility e-bike, and a dahon D7 that my daughter has absconded with.
Posts: 1,987
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 248 Post(s)
I upgraded to Hydraulic brakes this year, it was definitely an upgrade. I didn't bother changing to the rotors that came with the kit. I am just keeping them for spares.
Robert C is offline   Reply With Quote
Old 12-28-17, 01:14 AM   #14
MikeyMK
Cycleway town
 
MikeyMK's Avatar
 
Join Date: Jul 2014
Location: Milton Keynes, England
Bikes: 1.9kw GT LTS-3, 250w solar recumbent trike, 3-speed shopper, Merlin ol/skl mtb, 80cc Ellswick
Posts: 131
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 52 Post(s)
I've only ever ran floating discs really, never had a problem with warped discs. I've just put one-piece discs on my old bike because that's all i have for it, selling it anyway.

My discs are 203/180 but it's a heavy, high-speed e-bike. I believe smaller discs are better for feel and flexibility at low speeds.
MikeyMK is offline   Reply With Quote
Old 12-29-17, 12:01 PM   #15
jppe
Let's do a Century
Thread Starter
 
jppe's Avatar
 
Join Date: Oct 2004
Location: North Carolina
Bikes: Pinarello Prince/Campy SR; Cervelo R3/Sram Red; Trek 5900/Duraace, Cervelo P2C/Duraace, Cannondle Tandem/Ultegra
Posts: 6,892
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 150 Post(s)
I ordered these rotors:
SM-RT81 is the 160 mm centerlock XT level rotor.

I like the convenience of CR over 6 bolt....just me but Iíd probably lose one of the bolts before I got it assembled.

I had a heck of a time finding an Ultegra hydraulic 11 sp groupset with flat mounted brake calipers. Finally ordered post mounted calipers with adapters. Beautiful frame has been sitting in the box for a month.....all the components should be coming in over the next week.
jppe is offline   Reply With Quote
Old 01-01-18, 11:32 AM   #16
BluesDawg
just keep riding
 
BluesDawg's Avatar
 
Join Date: Feb 2005
Location: Milledgeville, Georgia
Bikes: 2018 All-City Cosmic Stallion, 2017 Niner Jet 9 Alloy, 2015 Specialized AWOL Comp frameset (custom build), 2015 Zukas custom road, 2003 KHS Milano Tandem, 1986 Nishiki Cadence rigid MTB, 1980ish Fuji S-12S
Posts: 13,438
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 121 Post(s)
I'm running TRP 25 centerlock rotors on my gravel bike. They have been quiet and true so far.
BluesDawg is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 05:38 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    get answers from real people!
Click to start entering your question.
I HAVE A QUESTION