R1 Big Brake Kits for the TRX!

offroadalliance · Sep 1, 2022

nickinfleet said:
yes please confirm with the R1 rep that this is in fact TRX specific.

Perhaps the kit changed in the last year when I inquired.

The original kit was not specifically designed for the TRX but would work. It is a heavy duty application BBK provided by R1 that fits many vehicles from their available parts.

I did, and it is.

nickinfleet · Sep 1, 2022

offroadalliance said:
I did, and it is.

so are you saying the R1 TRX kit changed from what was available last year?

nickinfleet · Sep 1, 2022

@offroadalliance i guess i appreciate the like. only spent 8-9k with offroad alliance.

offroadalliance · Sep 1, 2022

Fifty said:
Yea! I’d be curious what the front and rear piston area is. And if they can advise what the pad shape is so people could use other brand pads to further fine tune the brakes!

I still wish it was an 18 inch wheel kit. I’d be on this like flies on….

Here's what I got from our rep, if it's not enough info just let me know and maybe rephrase your question for a more detailed answer.

What is the front and rear piston area? Depends if it is leading or trailing. The piston usually goes from the biggest to smallest.

As for the pads, I don’t know the shape yet but still waiting on that info. I do know they make their own pads.

nickinfleet said:
so are you saying the R1 TRX kit changed from what was available last year?

I’m saying this big brake kit is unique to the TRX only. Our R1 rep insists this kit will not fit on any other vehicles. This kit has not changed, whoever you spoke to may have been mistaken.

Fifty · Sep 1, 2022

The piston area… it’s the total area of all the pistons in the caliper.
If you ask the R1 rep what the piston area is on the front caliper, they will know. That is the term. If they don’t know that term then God help us all.
It has nothing to do with piston count.

nickinfleet · Sep 1, 2022

From Kevin at R1. Yes, I called the manufacturer.

"The calipers and the rotors we have those but what is specific to the TRX is the mounting points and the brake line length. Things like that."

The exact size of each piston:

Front Calipers
2 x 38mm
2 x 36mm
2 x 32mm
2 x 30mm

Rear Calipers
2 x 34mm
2 x 32mm
2 x 28mm

Og Neon · Sep 1, 2022

Fifty said:
Yea! I’d be curious what the front and rear piston area is. And if they can advise what the pad shape is so people could use other brand pads to further fine tune the brakes!

I still wish it was an 18 inch wheel kit. I’d be on this like flies on….

I agree on the wheel size! I don't want to have to buy new wheels and I like the look of 18s!

nickinfleet · Sep 1, 2022

no plans for a kit that fits 18" wheels because they have to use a 380mm rotor (per Kevin @ R1).

Fifty · Sep 1, 2022

nickinfleet said:
From Kevin at R1. Yes, I called the manufacturer.

"The calipers and the rotors we have those but what is specific to the TRX is the mounting points and the brake line length. Things like that."

The exact size of each piston:

Front Calipers
2 x 38mm
2 x 36mm
2 x 32mm
2 x 30mm

Rear Calipers
2 x 34mm
2 x 32mm
2 x 28mm

The fronts are: 10,202 mm if you do the sliding caliper measurement (area of 2 57mm pistons x2)
So 7.9 per case, and 15.8” total.
The above is 7322 mm or 5.67” per case totaling 11.34”

I’m tired from doing math someone please redo it for me.

A smaller piston area will give a stiffer pedal and shorter pedal throw. The r1 caliper has a 28.22% smaller effective piston area. It’s 71.77% of the oem area.

How much pedal change will that have? (I’d have to do the rear brakes to see what the total change is)

You guys that have done the brake swap? Did you notice a stiffer pedal? I know the truck could use a shorter pedal throw.

This may be the solution

imclearwhite · Sep 3, 2022

Wish it was on the 18 inch

10mpg · Sep 3, 2022

imclearwhite said:
Wish it was on the 18 inch

I wish they weren’t 8 grand lmao. The brakes aren’t great on the TRX but they dont warrant an 8k upgrade. To each their own though.

imclearwhite · Sep 3, 2022

10mpg said:
I wish they weren’t 8 grand lmao. The brakes aren’t great on the TRX but they dont warrant an 8k upgrade. To each their own though.

No joke. Bs that ram didn't use brembo

10mpg · Sep 3, 2022

imclearwhite said:
No joke. Bs that ram didn't use brembo

I’d go for the Wilwood kit if they made something for the rears, just cuz I want 4 calipers that look the same.

offroadalliance · Sep 6, 2022

10mpg said:
I wish they weren’t 8 grand lmao. The brakes aren’t great on the TRX but they dont warrant an 8k upgrade. To each their own though.

You're about a thousand over, they're just over $7,000. Absolutely to each their own, but these kits are worth the money.

Fifty · Sep 6, 2022

Trx tax. Lolz But also since there will only be 3 years of trucks and not a huge number of them per year. Limits how many kits will be sold.

10mpg · Sep 6, 2022

offroadalliance said:
You're about a thousand over, they're just over $7,000. Absolutely to each their own, but these kits are worth the money.

Not saying I'll never get them. I'm upgrading to 20 inch wheels this week just for the purpose of being able to in the future. But, when I think about 7 grand for brakes...I'd rather put it elsewhere in the truck until I have everything I want performance wise completed. That being said, if someone releases a kit that is slightly below the R1 in terms of performance for considerably less money, I'd probably opt for that. The Wilwood front brake kit is under 3 grand. If they made something for rears and ended up being 1500-2k less than the R1's...that would be intriguing to me.

offroadalliance · Dec 5, 2022

Another happy customer! Jason got his big brake kit in anodized red and it came out great! PM to get yours today!

260onthego · Dec 5, 2022

DyLivn said:
Any data to validate braking improvement?

Right and what's the advantage of these over Rotora, for example, since they're around the same ticket?

offroadalliance · Dec 7, 2022

260onthego said:
Right and what's the advantage of these over Rotora, for example, since they're around the same ticket?

I've been told the Rotora kit doesn't give much extra performance. the customers we've sold this R1 kit to have boasted about how much added brake performance they got once installed.