RockyMounts GuideRail | Blister

Design, Features & Impressions

The GuideRail is a tray-style hitch-mount rack, with two ratcheting arms that hold bikes by the tires. As a result, there’s no frame, fork, or wheel contact to rub or scuff anything, and because neither wheel location is 100% fixed, you can move the bikes side to side by a few inches to dial in clearance with multiple bikes loaded up. RockyMounts says that the Guiderail is compatible with 20’’ to 29’’ wheels with up to 3.0’’ wide tires, though if you’re making large-scale changes to wheel size, you will need to adjust the wheel stops on the wheel arms up or down, which requires an Allen wrench. I’ve tried tires up to a 2.5’’ 29er, and down to #26aintdead by 2.3’’, plus 700x23c road tires without issue, and none of those felt at all close to maxing anything out. RockyMounts does note that the GuideRail may not play nice with a lot of fenders, especially rear ones that extend far back over the tire, but smaller mountain bike front fenders are no issue.

The 2’’ hitch version of the GuideRail that I’ve been testing is available now, and a 1.25’’ version is coming soon, as is a 2’’ version with a swing-out arm, called the AfterParty. All three versions hold two bikes (up to 55’’ wheelbase and 60 lb each) and the 2’’ version of the GuideRail can be expanded to a third bike with an optional add-on tray, though doing so drops the per-bike weight limit to 45 lb. The AfterParty and 1.25’’ GuideRail are capped at two bikes. The hitch mechanism and folding mechanism on the GuideRail are made from powder-coated steel; the wheel trays and arms are almost entirely made from aluminum, with very few plastic parts anywhere. Despite that, the 2’’ GuideRail weighs 48.4 lb (22.0 kg), just 3 lb more than a 1Up Quik Rack Single with a second add-on tray (which is made pretty much entirely out of aluminum).