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Any way to 'upgrade' rear calipers? '03 1500 with 16" wheels

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Any way to 'upgrade' rear calipers? '03 1500 with 16" wheels

Postby Chevy-SS [OP] » Jun 15 2021, 2:16pm

Is there any way to 'upgrade' rear calipers? Truck is '03 1500 LS with 16" wheels. I am looking for a little more stopping power when driving around.

In the front, I would (if I could) immediately perform the factory-parts upgrade to 13" front rotors, BUT I have 16" wheels, which precludes me from doing that. :cry:

So I am looking at doing something to the rear disc setup. I looked and I have no room for larger rotors, the clearance from caliper to inner barrel of wheel is about same as in front, about 1/2". So it seems the only 'upgrade' I might be able to do in the rear is to go from single piston caliper to dual piston.

So, whaddaya think, is it possible to go from single piston rear calipers to dual pistons using some factory parts? :?:
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Re: Any way to 'upgrade' rear calipers? '03 1500 with 16" wh

Postby ricka182 » Jun 15 2021, 2:36pm

I think the 16" wheels are going to be your blocker. As nice as they look, you may not find many calipers that will fit in 16" wheel. That's why 18" is the smallest you can use on an NNBS and up...
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Re: Any way to 'upgrade' rear calipers? '03 1500 with 16" wh

Postby vpasla1 » Jun 15 2021, 3:08pm

1) fronts do the majority of the braking.

2) NNBS have 17 inch stock on a lot of trims, but you'll need to upgrade to at least 17 inch.
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Re: Any way to 'upgrade' rear calipers? '03 1500 with 16" wh

Postby SierraHarley » Jun 15 2021, 3:09pm

I've got 17" wheels that were stock on my truck.
Nevermind vpasla posted before I did...
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Re: Any way to 'upgrade' rear calipers? '03 1500 with 16" wh

Postby shakenfake » Jun 15 2021, 4:35pm

I think actually the NBS SUV parts will fit a 16" wheel but don't quote me on that. Those are a two piston set up and require caliper piston and rotor swap. I cannot find the link that I used to have on it though... I'll dig around later after work and look again.
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Re: Any way to 'upgrade' rear calipers? '03 1500 with 16" wh

Postby Chevy-SS [OP] » Jun 15 2021, 4:54pm

shakenfake wrote:I think actually the NBS SUV parts will fit a 16" wheel but don't quote me on that. Those are a two piston set up and require caliper piston and rotor swap. I cannot find the link that I used to have on it though... I'll dig around later after work and look again.


Oh man, thanks! Please post up the links if you can. I have good relationship with local parts store. I will get the parts and try to install on one wheel, and if they don't fit, I can return them with no problem. :mrgreen:

Thanks again!

And thanks to all the others posters! ;)
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Re: Any way to 'upgrade' rear calipers? '03 1500 with 16" wh

Postby adriver » Jun 15 2021, 5:35pm

The NNBS rear uses a 13.6" rotor with a single piston caliper. The NBS SUV rears are a 13" rotor with a dual piston caliper. I have the NNBS fronts and NBS SUV rears on my 02, running a NBS 17" Tahoe N88 wheel. Eyeballing it, I get about 1/2" clearance up front, and about 1" clearance in the rear. I would guess it depends on the wheel shape, but I think you should be able to do it.

Not sure if you are stuck on your 16s, but you really need to upgrade the fronts to get better braking. The rears alone may upgrade, but they won't do much to help if anything. If your rears suddenly worked much better, then its just going to increase the chances they will lock up when there's no weight or wet out.

I see sets all the time with good tires for less than $200. Pick n pull has wheel sets for $100, and $150 with good tires, even if you have to piece together sets from the yard. As others have said, doing the fronts will be a much better way to do this.

You could always do hydroboost first, and wait to do the fronts when your tires need replacing. It will upgrade your brake system in front of the calipers, and I would bet it would do more for you than the rears.
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Re: Any way to 'upgrade' rear calipers? '03 1500 with 16" wh

Postby Chevy-SS [OP] » Jun 15 2021, 9:14pm

Yeah, I agree with all this ^^^^^^^^^^^^, and I fully understand about front brakes doing most of the work. But my 16" tires are not that old, and they ride perfect, no shakes, and they are comfy over the bumps, and they are quiet. I've actually been looking on Craigslist for a set of 17" wheels/tires, but all the sellers want too much money.

And I did actually consider the lockup potential, but the ABS should negate that downside. I've been driving this truck for 8 years and have never locked up the brakes yet, I'm a cautious driver.... but I get it.
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Re: Any way to 'upgrade' rear calipers? '03 1500 with 16" wh

Postby adriver » Jun 15 2021, 11:21pm

If those 16s are skinny, those are hurting your stopping too.


My guess is these are the most common chevy 6 lug 17" wheel there is. You should be able to piece a set together for real cheap. If I tried I think I could do it with decent tires for less than $150.

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just in case: you also have offerup.com and facebook marketplace.
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Re: Any way to 'upgrade' rear calipers? '03 1500 with 16" wh

Postby shakenfake » Jun 16 2021, 9:11pm

For the front brake upgrade I suggest going the way of the 2020 brake system. I think those fit 17s but they may require some modification, I know they fit 20s lol

I looked and for the life of me I cannot find the SUV rear upgrade. I was going to do it too later this year but no cigar. I'll find it soon
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