Reviews, ratings, specifications, weight, price and more for the MRP Lopes SL Chainguide. Have them on two bikes. They're a massive rippoff, but all chain devices are, pretty much. Feather light, easy to set up, have dropped no chains yet (though I onlyMRP Lopes SL Chain Guide Chain Accessories user reviews : 0 out of 5 - 0 reviews. Read it's strength, weaknesses, find deals and pricing - mtbr.com. Find many great new & used options and get the best deals for MRP Lopes SL 32-38t Black ISCG Chain Retention Systems at the best online prices at eBay! MRP Lopes SL Chain Guide - Lowest Prices and FREE shipping available from The World's largest online bike store - Chain Reaction Cycles. 28 Jun 2011 Based on the very popular G2 SL guide, the MRP Lopes guide is a stripped down, bare bones chain retainer. The upper and lower guides are. At just 100 grams, the MRP Lopes SL Chainguide is the lightest full chainguide on the market. MRP sacrifices bash protection in the name of weight loss for 4X, Buy your MRP Lopes SL Chain Device - Internal from Wiggle. Our price . Free worldwide delivery available. Anyone running one of these? I've read the description a few times and I'm still not sure if I need to buy the adapter to fit this to my SL or if it.