MRP G2 and Mini-G Chain Guide

written by: J.V. Nixon

, MRP G2 and Mini-G Chain Guide

Introduction:

The MRP G2 introduced in late 2007 features an integrated guard that ushered in a few new guides for MRP. The guide’s goals were to be super lightweight without sacrificing chain retention, rigidity, or protection of the chain and chain ring. The integrated guard helps to protect the chain and also the rear pulley wheel while minimizing the contact area typically used in a full bash guard setup. The G2 is available in a black back plate with white or black plastics. The Mini-G is changing to a black back plate with white or black plastics.

, MRP G2 and Mini-G Chain Guide

(click to enlarge)

The Product:

MRP has two variants available of the G2, the G2, and the Mini-G. The G2 fits chain rings sized 36-40t and the Mini-G fits chain rings sized 32-36t. They offer all the various mounting methods including ISCG (old), ISCG-05, and bottom bracket mount.

, MRP G2 and Mini-G Chain Guide

bottom bracket mount version of the Mini-G (click to enlarge)

, MRP G2 and Mini-G Chain Guide

G2 ISCG backplate (click to enlarge)

The G2’s bash guard connects to the back plate and protects a lot of the vital parts in the drivetrain. In addition to protecting from front and underside impacts, the G2 bash guard also extends back and protects the chain guide pulley as well. The guide adjusters were easy to adjust as they both use one bolt to secure to the back plate.

, MRP G2 and Mini-G Chain Guide

(click to enlarge)

The edge of the integrated bash guard bevels inward to provide a bit of additional protection. This gives it a wide bash area so no matter how your guide is positioned, the vitals are protected by the bash.

, MRP G2 and Mini-G Chain Guide

(click to enlarge)

The design of the back plate is small in stature and has a good bit of clearance. It helps the G2 guides fit on bikes pretty easy without modifications as seen in the picture below.

, MRP G2 and Mini-G Chain Guide

(click to enlarge)

, MRP G2 and Mini-G Chain Guide

(click to enlarge)

How well does it perform?

The MRP G2 and Mini-G guides did their job quite well. Audibly, the G guides weren’t loud but they also weren’t completely silent. Setup was a breeze and they had significant clearance around all frame members like the down tube and the chain stay. The wide skid plate offered a wide footprint of safety keeping the whole chain guide safe from damage including the rear pulley.

The Mini-G and the G2 offer a little bit different approach to protection in that they aim to protect the underside of your bike and partially front/side impacts from what we’ve noticed. The chain and chain ring in general have a little bit less protection compared to a full bash guard that typically connects to the crank arm.The upside is that the skid plate lets you glide across obstacles easily. It also gave a more natural feel when an impact did occur as the bash guard is essentially right below the bottom bracket and not skewed to the side. This makes timing hits more predictable and easier to control.

These guides, while they are lightweight, can take a beating just as well as a full bash guard setup but it should be noted that the impacts have to be absorbed by the frame to some degree. If your ISCG tabs aren’t strong, you do run the risk of potentially bending / breaking them if your frame manufacturer doesn’t have robust enough ISCG tabs.

The two areas we felt the G guides could improve on potentially was in the the upper arm and the coverage of the lower pulley. The upper arm we felt could be stiffer and allow for some more clearance with the chain as it rubbed a little bit. The lower pulley we felt also could have extended further across the chain ring a little bit more as well as not relying on the lower bash plate for support. The lower pulley is secured partially by the skid plate but we would’ve preferred to see the pulley independently secured to the back plate.

, MRP G2 and Mini-G Chain Guide

(click to enlarge)

, MRP G2 and Mini-G Chain Guide

(click to enlarge)

We’ve been running the Mini-G on our Banshee Amp for our slalom / 4X build with similar success. It offers a compact footprint which is nice to have the protection without the bulk. It would’ve been nice to have been able to remove the skid plate for some build situations that don’t warrant the necessity for a bash guard.

, MRP G2 and Mini-G Chain Guide

(click to enlarge)

, MRP G2 and Mini-G Chain Guide

(click to enlarge)

Weight:

Parts Year Real(g) Pic.
MRP G2 (36-40t) ISCG 2008 259 , MRP G2 and Mini-G Chain Guide
MRP Mini-G (32-36t) ISCG 2009 225 , MRP G2 and Mini-G Chain Guide
MRP Mini-G (32-36t) ISCG-05 2009 226 , MRP G2 and Mini-G Chain Guide
MRP Mini-G (32-36t) BB 2009 231 , MRP G2 and Mini-G Chain Guide
MRP ISCG Short Bolts 2008 8 , MRP G2 and Mini-G Chain Guide
MRP ISCG Long Bolts 2008 11 , MRP G2 and Mini-G Chain Guide

Price:

  • MSRP MRP Mini-G $150
  • MSRP MRP G2 $150

If you have any questions about the MRP G2 or the Mini-G feel free to contact MRP about any additional information you would like to know.

With the MRP G guides, we never dropped the chain and it took all impacts during testing without fail. The MRP G guides are lightweight and a breeze to setup. They shed debris well and kept the important drivetrain components safe from harms way. If you’re in the market for a chain guide, you’d be wise to put the MRP Mini-G or G2 guide on your short list.

If you’d like to purchase one of their products you can check their site for dealers or any bike shop should be able to order one for you. Alternatively, you can contact Chad at Red Barn Bicycles and he can set you up.

[MRP G2 and Mini-G Gallery] [MRP Website]