Rockbros Nylon Fiber: The Best Flat Pedal Under $25

rockbros pedal
pedal end view

Let’s be honest here: There are about 100 different platform pedals on Amazon that look almost identical to the Rockbros Nylon Fiber for about the same price.

They’re all brands you’ve never heard of, and all appear interchangeable at a glance: Fooker, Imrider, MZYRH (what?), Puroma… the list goes on. Who are these companies? Just how large is the market for knock-off Race Face Chester pedals?

And again, just being honest, these pedals all very well may be interchangeable in terms of quality and performance. That’s the joy of Amazon. Could be great. Could be garbage. Roll the dice and worst-case scenario you’ll be burdened with returning a package.

We were rolling the dice the first time we ordered a set of Rockbros Nylon Fiber pedals off Amazon. The reviews looked promising and the Rockbros (like so many others) appeared to be an almost direct replica of the Race Face Chester nylon pedal that changed the game years ago, so why not give it a try?

After running the Rockbros Nylon Fiber pedals for a few months, we can honestly say they’re punching way above their price point.

No, they’re not the flashiest or grippiest pedal on the market, but they’re well built and can take plenty of abuse.

We tore down a set of these $25 wonders to see what they’re made of, and our findings are surprisingly positive.

 

pedal measure
pedal concave

The RockBros pedals measure 17mm on the outside and 14mm in the middle, giving it a slight concavity. The more concave a pedal is, the more grip it has.

Construction

Construction of the Rockbros Nylon Fiber borrows heavily from the Race Face Chester playbook as you might imagine.

Composite body, Cro-Mo spindle, sealed bearings, and replaceable bottom-loading pins. Standard fare, all things considered.

They’re surprisingly light for the price point though, tipping our scales at 370 grams a pair, which puts them just 10 grams above the Chester. Not bad considering the Nylon Fiber also features two additional grip pins per side, making 10 pins to the Chester’s 8.

Internally the construction was fairly standard. The Cro-Mo spindle sits inside a DU bushing on the inside and replaceable roller bearing on the outside. We found the internals to be surprisingly well sealed, with a dust seal on the inside and a second dust cap on the outside to extend service life.

Of course the odds of you wanting to spend your time servicing a $25 pedal are slim, but knowing it can be done sweetens the deal for us.

We were also interested to find that the Rockbros are slightly thinner than the Chester, measuring 17mm at their outer edge before tapering down to 14mm in the center.

pedal bearng
bearing pedal

The pedals are serviceable. They have a DU bushing on the inboard side, with a roller bearing on the outboard side.

What We Like About The Rockbros Nylon Fiber

Obviously, there’s a lot to love about the price, but a cheap pedal is worthless if it doesn’t deliver the goods.

The Rockbros isn’t exactly a gamechanger, but at $25, it’s fair to say that the Nylon Fiber exceeds expectations.

The spindle is sturdy and appears well made, as are the rest of the internals we discussed above.

The 3mm pins provide decent grip, and their variable height at front and rear helps add to the concave effect at the middle of the pedal, providing a surprisingly planted feel.

The concavity isn’t anywhere nearly as pronounced as something like the DMR Vault we run on our hardtails, which can be both a good and bad thing.

The mild shape is good (especially for newer riders) because it allows for easy foot adjustments on the fly if you feel you need to reposition. A misstep on the DMR’s, on the other hand, will often result in committing to a less-than-ideal foot placement until you can get a chance to remove your foot front the pedal completely.

pedal parts
pedal spindle

The pedals can be disassembled by removing the dust cap on the outboard side and then removing the retaining nut on the end of the spindle. The chromoly spindles appear to be fairly well made.

The RockBros are a bit smaller than the Chester as well, measuring 99mm x 99mm to the Race Face’s slightly wider 101mm x 110mm platform, but overall the size is adequate for your average foot.

Riders with larger feet may feel a bit cramped on the Nylon Fiber, but for our size 11 tester, the platform was solid.

What We Don’t Like

Our biggest complaint with the Rockbros Nylon Fiber pedal is that it definitely has the look of a $25 pedal next to some of the premium aluminum pedals out there, but if we’re being honest, so does the Chester.

You may not care (we certainly don’t), but from a fit-and-finish standpoint, the Rockbros isn’t fooling anyone.

The grip could definitely be improved as well. The pins do their job, as does the decent-sized platform, but narrower pins and another 20mm of pedal on each end would be ideal.

We wouldn’t mind having a little more concavity on the footbed either. This can largely be up to personal preference depending on how much you tend to move around on the pedals. A more concave shape gives a more planted feel, and helps keep your feet on the pedals during technical climbs as well.

pedal wieght
pedal pins

The Rockbros pedals are fairly light, they weigh in at 185 grams apiece. The pins are 3mm bolts with nuts and are replaceable.  The pedals come with a bag of about 4 extra pins.

Crash testing the pedals

pedal damage end
Crash damage

Do the pedals stand up to abuse? I have used these pedals for a season now, and so far they have. In the above crash video, the impact was hard enough to bend the crank, but the pedal spindle did not bend. When you’re riding a 115lb bike the pedals get trashed no matter how good of pedals you buy, which is why I get cheap pedals.

Final Thoughts On The Rockbros Nylon Fiber

All small gripes aside, we’re big fans of the Rockbros Nylon Fiber.

For $25, this is one Amazon pedal you won’t regret trying out, even if it’s just a backup or for a project bike.

It checks most of the boxes of the Raceface Chester, and costs about half as much.

We tend to abuse our pedals here, especially when testing them on heavier bikes like the Motoped, so we’re used to buying cheap pedals and hoping they survive the next crash.

Speaking of which we did get a chance to crash-test the Rockbros and the results were encouraging. We actually managed to bend a crank but the pedals themselves only suffered a little rash, and remained straight as an arrow.

If you’re on the fence about the Rockbros, we say go ahead and pull the trigger. The price is right, the construction is quality, and the serviceable internals guarantee you’ll get your money’s worth out of these rugged flat pedals