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Deore MT520/510 series

March 25, 2021, 8:34 p.m.
Posts: 3124
Joined: May 23, 2006

4 pot brakes any good? Looking to replace 2 pot XT.

Judgments are not intended to imply that we have proof that shows something to be a fact. - ODNI

March 25, 2021, 9:12 p.m.
Posts: 838
Joined: March 15, 2013

I have a set on a bike that I've ridden on the road on the way home from work for about 8 kilometers and they feel alright, waaaaaay better than the Guide T's on a bike I rode on Burke a handful of times.

You're welcome for my nearly completely useless reply lol.

March 26, 2021, 2:14 a.m.
Posts: 30
Joined: March 14, 2017

Loads of riders run them in the UK as they were (until Brexit) available for about £40 an end from some German sellers.  The general feeling is that they are good and powerful but with less bells and whistles (no bad thing with Shimano brakes imho) and with a slightly less nice finish (eg pad retaining split pin not threaded screw) than say XT.

Just check the pads that they come with, they might be the crappy soft not sintered ones.

March 26, 2021, 6:08 a.m.
Posts: 887
Joined: May 11, 2018

My understanding was that the calipers are very similar to xt 4 pot. Why not run xt levers with deore calipers?

March 26, 2021, 7:32 a.m.
Posts: 1188
Joined: Nov. 21, 2002

The MT520 4 pots are very good, no discernible performance benefit to the higher end offerings IMO. I have them paired with old 985 levers.

March 26, 2021, 7:46 a.m.
Posts: 424
Joined: Nov. 25, 2013

I moved from SLX 2-pot to Zee 4-pots, amazing improvement in brake control - not sure I'll ever go back to 2-piston brakes.

March 26, 2021, 5:13 p.m.
Posts: 3124
Joined: May 23, 2006

Ok thanks for all that in the end I scrolled down page and ended up buying a complete SLX 4 pot set that I found.

Why not run xt levers with deore calipers?

I was eyeing some xt calipers at CRC but dithered too long - they sold out. Is it easy generaly to just buy calipers? Would think it harder to find lower spec stuff split apart?

So, I gotta' buy an adaptor for the rear. Am I giving up heaps by continuing with a 160 on the rear or should I move the 180 to the rear, buy two adaptors and put a 203 on the front?


 Last edited by: tungsten on March 27, 2021, 3:37 p.m., edited 2 times in total.
March 26, 2021, 11:34 p.m.
Posts: 1405
Joined: Nov. 8, 2003

Are you a husky lad?

March 27, 2021, 1:33 p.m.
Posts: 3124
Joined: May 23, 2006

lol....186~

March 28, 2021, 9:16 a.m.
Posts: 1848
Joined: April 25, 2003

I’m just a “trail” rider and weigh the same as you and I always appreciate an upgrade in power. 

I don’t think the benifits of the larger disk is as noticeable as going to 4 piston, but it’s significant.

March 29, 2021, 1:58 p.m.
Posts: 93
Joined: Feb. 24, 2017

Bigger rotors. Unless you're unable to modulate with your finger.

March 29, 2021, 2:09 p.m.
Posts: 97
Joined: Feb. 16, 2013

I had a set of 2-pot SLX brakes, and purchased some Deore 4-pot calipers for them ($90 CAD each). I've got lots of old sets of brakes, and since the Deore calipers don't use the repositionable banjo connection, I needed to use some brake lines from old Shimano brakes to graft them over to the SLX levers. They work great now though, SO MUCH POWER.

I like the SLX levers for the reach adjust, but it would be more ideal to graft on some SLX calipers, due to the brake line compatibility. Or if you've got Deore 2-pot brakes, upgrading the calipers would be a direct change-over to the Deore 4-pot calipers.


 Last edited by: mammal on March 29, 2021, 2:09 p.m., edited 1 time in total.
April 4, 2021, 4:23 p.m.
Posts: 3124
Joined: May 23, 2006

Rubbing alcohol to clean brake rotors in a pinch?


 Last edited by: tungsten on April 4, 2021, 4:24 p.m., edited 1 time in total.
April 4, 2021, 6:33 p.m.
Posts: 1328
Joined: Sept. 30, 2006

Posted by: tungsten

Ok thanks for all that in the end I scrolled down page and ended up buying a complete SLX 4 pot set that I found.

Why not run xt levers with deore calipers?

I was eyeing some xt calipers at CRC but dithered too long - they sold out. Is it easy generaly to just buy calipers? Would think it harder to find lower spec stuff split apart?

So, I gotta' buy an adaptor for the rear. Am I giving up heaps by continuing with a 160 on the rear or should I move the 180 to the rear, buy two adaptors and put a 203 on the front?

Just an FYI, you cannot buy anything Shimano from CRC anymore.

April 4, 2021, 8:23 p.m.
Posts: 3124
Joined: May 23, 2006

They were up there last wintyer "hot item" "47 people looking at this".

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