The MRP SXg works in conjunction with newer 1x technologies to help keep the chain in place without introducing drag.

The MRP SXg works with newer 1x systems to help keep the chain in place without introducing drag (click to enlarge).​

Lowdown: MRP SXg Chain Guide

While narrow/wide chainrings and clutch derailleurs have mostly made dropped chains a thing of the past, we still value the added protection of a chain guide and skid plate. The new SXg guide from MRP offers piece of mind in a lightweight package that introduces minimal drag. It's also easy to install. Read on to learn more.

Materials: Alloy or carbon. Nylon+TPU guideWeight: 30-34t carbon 106g; 34-38t alloy 149g
Sizes: 30-34t and 34-38tPrice: Alloy $170, Carbon $225
Chainline compatibility: Alloy 49mm and up; carbon 50mm and up, Boost 148Rating:
4.5 Flamin' Chili Peppers
4.5 out of 5
Stat Box


Pluses

Minuses
  • Easy install
  • ISC-05 only
  • No drag
  • Only works with 30t and up

Review: MRP SXg Chain Guide

Whether you're running a newer 1x drivetrain or have cobbled together your own 10-speed version, there's a good chance you haven't experienced a dropped chain in a while. That doesn't mean you should write off the chain guide, though. These devices are handy for a number of reasons. We like them for the added protection they offer (especially when you're talking about $90 chainrings), but racers swear by them as well. The new generation of chain guides are also vastly different than the version you may have run on your old downhill rig or 1x9 trail bike.

The lower guide of the SXg does not contact the chain under normal circumstances.

The lower guide of the SXg does not contact the chain under normal circumstances (click to enlarge).​

The big mark against chainguides in the past was the amount of drag they added. But the MRP SXg manages to offer both lower and upper retention with minimal drag. The key is the Colorado company's WhipperSnapper lower guide, which does not make contact with the chain under normal circumstances. Instead it works in conjunction with a narrow/wide chainring or clutched derailleur to catch the chain, while most full guides utilize a lower roller or pulley that applies tension.

Continue to page 2 for more of our MRP SXg chain guide review »


The upper and lower guides swing away to allow easy installation of the MRP SXg.

The upper and lower guides swing away to allow easy installation of the MRP SXg (click to enlarge).​

Both the upper and lower SXg guides are made from nylon and have a TPU co-molded liner to help reduce noise. They also swing out to allow for easy installation or drivetrain maintenance, and are adjustable to accommodate different sized chainrings. The alloy unit we tested can accommodate chainrings from 30-34t. There's also a 34-38t version.

The inside of both the upper and lower guides are lined with a TPU that helps minimize noise from chain slap.

The inside of both the upper and lower guides are lined with TPU that helps minimize chain slap noise (click to enlarge).​

We mounted our test unit to a Santa Cruz Bronson late last year and the process was painless. The guide mounted without the need for spacers and we've had zero issues with dropped chains. More importantly, we've banged our bottom bracket into landings, slammed into rock ledges, and crashed into downed logs without bending our chainring.


MRP's approach with their new WhipperSnapper equipped SXg guide provides the benefits of a full chain guide without impeding drivetrain performance in the slightest. Even if you're not a full time racer, we're fans of the system for the peace of the mind and protection it affords. At just over a 100g for the carbon version or 150g for the alloy, it's light enough to make you say why not for anything but the most XC oriented of builds.

For more info, visit www.mrpbike.com.