The covers might not lie completely flat when they are trimmed extremely small. This applies to very deep profile rims in excess of 80mm. Bike covers usually come in different sizes, determined by how many bikes they’ll cover. While it might seem logical to buy a 1 bike sized cover if you’ve only got 1 bike, I’d recommend that you go for a bigger size.

A flat disc is generally found in wind-tunnel tests to be worth a saving of about 30-40 seconds over a 25-mile time-trial compared with a standard road wheel. A lenticular disc or a set of wheel-covers can improve a further 5-10 seconds on that, possibly more in a stronger crosswind. When you race with a disc wheel, you'll need a 90-degree pump adapter to access your valve with a standard pump such as the Silca presta adapter.Your wheel must have 5mm minimumclearance between the largest cog on your cassette and the drive side spokes. It’s especially important to use a cover if you store your bike outside. If you live in the city, you’ve likely seen those poor bikes changed outside battling the elements ( and losing.) Even indoors, a cover reduces the possibility of grease and grime showing up on walls and floors. No matter where you need to park your bike, whether it be for a few hours or a few months, it’s a small investment toward the maintenance and care of your favorite ride. Look out for the stitching used to hold the bike cover together too. You want double stitched and heat treated seams to maximise tear and water resistance. What size do you need? Performance estimates are based on a number of assumptions. Individual results may vary. Key assumptions are:-

Wheelcovers are available in a number of shapes to suit frames with close-fitting, curved chainstays and seatstays, including specific frames like the Planet-X Stealth, Specialized Transition etc. The type of material that a bike cover is made from is really important! It will determine how well the cover resists sun and water. Plus how durable it is against wear and tear. It will also have a big influence on how much you'll pay! So it’s probably worth thinking about how often you’ll be using the bike that you’re covering. If you're using it every day, you might want a slightly lighter cover than if your bike will be under cover for weeks or even months at a time. You will need to remove your cassette to install the Aero Disc Cover. Cassette removal tools are sold separately.But if you get the material (and stitching) right, you'll have a bike cover that will last a decent amount of time, whatever the weather. You'll pay more for better quality material, but not much more, so it's a worthwhile investment. If you don’t have a shedor garage to store your bike in, and you can’t keep it inside your home, then you'll probably have to leave your bike in your garden or yard.