SLX M665 Vs M7100 Vs M7120?

Is there much difference in performance between between SLX M665 brakes and the current M7100’s

I’ve got a perfectly working set of M665’s but realised I’m going to need new hoses to fit the bike I want to use them. This additional cost plus the headache I had trying to find pads for them is making me think I may as well just get new brakes.
And while I’m spending £200, should I spend £300 on the four pot version?!
(Which might be overkill in Anglia)

Probably not if they are all working properly with no leaky callipers and properly bled. Certainly comparing the twin pot versions.
I’ve got 2010 m665 brakes still running fine (on the hardtail my lad uses every day at uni) and new m7100 on my best bike. Can’t say I notice a difference between them and the deore m596 from 2012 on another bike.
Bigger rotors for more power…

Agree with the doc, I have two sets of the 665s which have been on about five different bikes since 2010 and are still going strong. I keep budgeting for a possible replacement but they just keep stopping.
Puzzled by not being able to find pads. They seem just as available as the more modern brakes on my other bikes

655s seem great to me, but then I’m not doing anything too demanding. I’ve got finned heat dissipation pads and these are lasting a very long time, and nice and quiet too, not squealing and screaming like previous regular pads.

I’d suggest making your choice of new brakes between the Deore 6100 and 6120, rather than the SLX.

Save a few ££s and potentially more reliable for negligible weight gain.

The M665s were great brakes, but nothing wrong with updating and selling them on while they still work fine.

@chakaping I’m interested in why you would say Deore are potentially more reliable?

If your current brakes are working fine I’d stick with them, perhaps if you feel like upgrading in a few years then prices may have come back down and a replacement set will be significantly less than what you’d pay now.

I’m interested in why you would say Deore are potentially more reliable?

I had some Deore brakes from a few years ago, the first generation of the new shape, and they never needed bleeding or anything apart from new pads. No wandering bite point whatsoever.

And I’ve seen reviews which suggest some journalists have found the same – that Deore are less prone to the wandering bite point issue.

I’ll be getting the 6120s for my next brakes.

Can’t get Deore’s; the rest of the groupset is SLX. Otherwise the bike will catch fire and Jupiter will fall out of alignment.

I’ve seen so many failed current Shimano levers (either failed bladder or snapped lever blades) that I’d either keep the current brakes, or if you want moar power try and find a set of Zee somewhere.