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MTX Gold - Lack of power and noisy after getting wet

2.4K views 7 replies 5 participants last post by  Cerpss  
#1 · (Edited)
UPDATE: The rotor reset worked, Ive eaten my words

I ended up picking up a set of MTX GOLD pads to run with my SRAM CODES and SRAM HS2 rotors

I went through the bedding process and had around 9-10 rides with them that have been trouble free

Most recently, its been raining on and off here and I've run into an issue- There is a creek crossing that I need to walk through to get to the trailhead and every time I take the creek crossing (wheels in the water), when I get to the trail head I essentially lose any bite or braking power

It takes me dragging the front and rear brakes for 10 mins+, its slow tech, until I start to feel some bite...and the only way that I gain back dry weather braking is when Im 70% of the way down the trail

Is this normal? I understanding that brakes require a good temp for them to be working well, but I've never experienced this with Sram Metal Sintered pads

I've connected with MTX to get their take on things, but Im not sure I agree with them (rotor reset) as the Brakes return to "full" power in the dry or dragging the brakes on longer higher speed downhills

MTX response below
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Customer Support
(MTX Braking)
May 24, 2024, 12:58 PM GMT-12
HI Ehfour,

Normal? No - but it will always take a few seconds for the brake pads & rotor to "recover". But seconds, not minutes.

The Code + HS2 is as good as it gets and has been very trouble-free for us.

I would do a Rotor Reset and see if that improves the recovery time. We've done a TON of testing where we're literally riding in and out of a creek for miles with no issues like that. Noise, sure, but not a loss of feel.

https://support.mtxbraking.com/hc/en-us/articles/13231610024724-How-do-I-reset-prep-my-used-rotors

Try that; if they are still vague, report back and we'll dig in further.
 
#3 ·
I also recommend the "rotor reset". I use 80-100 grit sandpaper on the rotors in a cross-hatch pattern, both inner and outer rotor surfaces. It doesn't take more than a few minutes.

I also then recommend removing the pads and doing a few light figure-8s on sandpaper on the pad material, then re-bed.

My gold will squeak once or twice when wet, but not what you describe.
 
#6 ·
It does beg the question though, what caused it? A dozen normal rides, then one wet and you have to scrub the rotors? I tend to feel heat and use are the best things for disc brakes sometimes.
That said, back in the Hayes Mag days we'd used to occasionally scoop up some mud or dirt and coat the rotor to sort any squealing. I assume it whipped a layer of the pads quick smart.