DMR Viral chain guide review

Affordable option

Our rating 
4.0 out of 5 star rating 4.0
GBP £79.99 RRP
DMR Viral chainguide

Our review

A good low-cost option that'll keep your chain on
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The Viral chainguide is DMR’s latest contribution into the ever-expanding chain device market. As usual with DMR, it comes in five brightly coloured anodised versions so you’re sure to find one to match your ride. It can be adjusted to work with chainrings from 28-38 teeth. The costs are kept down with the use of a steel lower section, which does raise the weight slightly but not so much you’d notice.


Setup was super-easy and didn’t require any additional (or fiddly) washer spacers, working with almost zero contact across the entire range of gears. To make things even easier, the top and lower sections are easily adjustable allowing you to get the perfect fit. The Nylon guides do a great job and stay quiet even in the grittiest mud and we’ve had no issues with loosing the chain throughout the entire testing period.

Product Specifications


Name Viral Chainguide (12)
Brand DMR Bikes

Description Full chain device (ISCG05) – tough and fully adjustable - 28t to 38t CNC alloy upper back plate and a tough stainless steel lower section adjust independently allowing fine tuning to suit frame and set-up. Toughened nylon guides with precision bearing pulley wheel keeps the chain locked on. Includes adapter for frames without ISCG05 mounts. Upper guide for use with bashguards is available separately. Only 244 grams (including (optional) iscg mount) 214 grams (without (optional) iscg mount)