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Chrace




Joined: 28 Apr 2010
Posts: 2895
Location: Eating a Yorkie

PostPosted: Fri Mar 15, 2019 8:20 am    Post subject: Disc brake rotors Reply with quote

Just got some new wheels and putting rotors on them.

My stock wheels came with RT81 rotors and brake incredibly well. I bought some SRAM Centerline rotors for the new wheels and they brake like crap.

Any recommendations on 6-bolt 160/140 rotors?

All Shimano seems to be centerlock stuff. Do I really have to splash out on some Hope kit?
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stenard




Joined: 04 Sep 2013
Posts: 1984

PostPosted: Fri Mar 15, 2019 11:11 am    Post subject: Re: Disc brake rotors Reply with quote

Chrace wrote:
Just got some new wheels and putting rotors on them.

My stock wheels came with RT81 rotors and brake incredibly well. I bought some SRAM Centerline rotors for the new wheels and they brake like crap.

Any recommendations on 6-bolt 160/140 rotors?

All Shimano seems to be centerlock stuff. Do I really have to splash out on some Hope kit?

I thought all disc brakes were amazing?
(if I was on ST, I'd put "/pink" Cool )
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JaRok2300




Joined: 01 May 2014
Posts: 437
Location: Worcester, UK

PostPosted: Fri Mar 15, 2019 11:32 am    Post subject: Reply with quote

Are you sure there wasn't any kind of protective coating on the new discs that may have contaminated the pads?

I don't see the discs making as much difference to the braking performance as you seem to indicate.
I'd try giving everything a good clean with brake cleaner and see if they improve.

Apologies if you've done all that but worth stating just in case.
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Chrace




Joined: 28 Apr 2010
Posts: 2895
Location: Eating a Yorkie

PostPosted: Fri Mar 15, 2019 2:01 pm    Post subject: Re: Disc brake rotors Reply with quote

stenard wrote:
Chrace wrote:
Just got some new wheels and putting rotors on them.

My stock wheels came with RT81 rotors and brake incredibly well. I bought some SRAM Centerline rotors for the new wheels and they brake like crap.

Any recommendations on 6-bolt 160/140 rotors?

All Shimano seems to be centerlock stuff. Do I really have to splash out on some Hope kit?

I thought all disc brakes were amazing?
(if I was on ST, I'd put "/pink" Cool )

Most, but not all. Smile You should try the ones on my commuter - they're downright dangerous. But I've also had both good and crap rim brakes.

I'll try clean them a bit JaRok, haven't done it yet. Thought manufacturers would have wanted to show their products as awesome out of the box, but perhaps not...
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Tony Stark




Joined: 26 Apr 2007
Posts: 2485
Location: Milton Keynes

PostPosted: Sat Mar 16, 2019 9:15 pm    Post subject: Reply with quote

It's all about the pads - Shimano usually supplies resin pads as standard. Sintered are much better in most conditions, but they can eat some discs quite quickly.
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Chrace




Joined: 28 Apr 2010
Posts: 2895
Location: Eating a Yorkie

PostPosted: Mon Mar 18, 2019 1:39 pm    Post subject: Reply with quote

Tony Stark wrote:
It's all about the pads - Shimano usually supplies resin pads as standard. Sintered are much better in most conditions, but they can eat some discs quite quickly.

I had top class braking on the old rotors with same pads though?
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r0bh




Joined: 03 Aug 2005
Posts: 1608
Location: Manchester

PostPosted: Mon Mar 18, 2019 4:59 pm    Post subject: Reply with quote

I got some Aztec 140mm 6 bolt rotors to put on a second set of wheels, the other set have shimano centrelock 140mm rotors.

https://www.tredz.co.uk/.Aztec-Stainless-Steel-Fixed-Disc-Rotor-With-Circular-Cut-Outs_93469.htm

I swap them in and out keeping the same pads with no problems, maybe just a quick realign of the calipers.
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