A roof rack needs bars first, and the bars are often the larger cost
A roof carrier is only half a purchase: it clamps to crossbars you may not already own, and on a car with open roof rails a pair of bars often costs more than the carrier itself, while a boot-mounted strap carrier needs no bars at all but rests its load on the tailgate and obscures the number plate and lights unless a board is added. We compare bar compatibility, the load each manufacturer rates per bike, how many points touch the frame, and whether locks are included or sold separately.
3 bikes · 45 kg (99.2 lb) max · tailgate mount · no towbar needed
A tailgate-mounted rack for up to three bikes to a stated 45 kg (99.2 lb), needing no towbar and fitting without tools, with rubber buffers and rubberized hooks.
Best for: Occasional transport on a car with no towbar, where cost matters more than convenience.
Aluminum crossbars · 90 kg (198.4 lb) capacity · open rails · 20 mm (0.79 in) channel
Not a bike carrier but the aluminum crossbars a roof carrier needs, rated at 90 kg (198.4 lb), for open roof rails, with a 20 mm (0.79 in) channel that accepts a range of accessories.
Best for: Cars with open roof rails, as the foundation before any roof carrier is chosen.
≈ $185
1 bike · folds into a supplied bag · individual frame holders
An ultra-compact boot rack for one bike that folds into a supplied carry bag small enough for a rucksack, with individual quick-install frame holders.
Best for: Travelers and commuters who need a rack that disappears when it is not in use.
≈ $90
Roof mount · fits bars to 48 mm (1.89 in) · two hand knobs · 1 bike
A simple single-bike roof carrier that clamps to crossbars up to 48 mm (1.89 in) across, fitted with two hand knobs and stated to suit all bike models.
Best for: Adding a bike to a roof rack you already own, for the price of a set of tires.
≈ $110
Roof mount · no frame contact · carbon-safe · rear wheel strap
A roof carrier that holds the bike by the front wheel with no contact on the frame at all, which is why Thule states it as suitable for carbon frames.
Best for: Carbon-framed road and gravel bikes, where a frame clamp is the thing you are trying to avoid.
≈ $520
On a boot-mounted rack, the number of bikes decides the load applied to bodywork that was not designed for it.
A roof or boot rack allows a bike to be carried on a vehicle with no towbar, which is the starting constraint.
Bars, carrier and bikes add up, and the permitted roof load is lower than people expect. The stated empty weight comes off that limit before the bikes are counted.
Reckon on several tens of centimeters more. Underground car parks and height barriers are the most frequent accident with this format.
The contact points and the fitting direction are stated precisely. Approximate fitting marks the paint, and can deform the tailgate.
The rack has to suit the section and type of bars. The permitted roof load is set by the vehicle manufacturer.
Never: if the load hides lights or plate, a repeated light board and plate are required. That is a legal obligation.
Some roof mounts hold by the fork and require the front wheel to be removed. Others hold the wheel in place.
Crosswind is markedly noticeable, especially on the roof. Speed has to be adapted.
It costs fuel, whistles and wears. Most owners take it off when not in use.
A bike on the roof adds significant aerodynamic drag, and consumption rises markedly on a motorway. Taking the bars off out of season is what recovers the difference.
A bike on the roof adds several tens of centimeters: the underground car park is the most frequent accident with this format. On a tailgate the contact points are precisely prescribed — approximate fitting deforms the panel — and covering lights or plate makes a repeat board compulsory.
There is no table here, and the reason is in the listings. The figure published most often across these 5 products is capacity, given by 3 of them — short of the four in five a column needs to compare rather than to display gaps. Each product page says what its own maker published.
Specifications: manufacturer sheets for bike gear and the matching Amazon product pages. Prices and availability: Keepa.
Most recent revision in this category: August 30, 2026.
