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If you've got two bikes stored outside, you've probably asked yourself whether one cover can do the job. The short answer: yes, but only if you pick the right one. A flimsy single-bike cover stretched over two frames won't keep the rain out. A proper waterproof bike cover for 2 bikes will protect both machines from rain, UV damage, and the prying eyes of opportunistic thieves.
Here's what actually matters when you're choosing a bike cover for two bikes, and what to avoid.
Buying two separate covers sounds logical, but it's rarely the best approach. Two covers take twice as long to put on and remove. They blow around in the wind independently. And they cost more than a single large bike cover designed for the job.
A dedicated 2 bike cover waterproof design wraps both frames in one go. You pull it over, secure it at the base, and you're done in under a minute. That's the difference between actually using the cover every day and leaving it folded up in the garage because you can't be bothered with the faff.
This is where most people go wrong. They buy a cover that's technically big enough, but doesn't leave any slack. Two bikes side by side need more width than you'd think, especially if one has wide handlebars or a basket.
Look for a cover that's at least 200cm long, 65cm wide, and 120cm tall. Our BTR Heavy Duty Waterproof Bike Cover measures 230cm x 70cm x 126cm, which gives enough room for two standard bikes with space to spare. That extra slack isn't wasted. It means the cover drapes to ground level, keeping rain from blowing underneath.
If you're covering a mountain bike alongside a road bike, the wider handlebars on the mountain bike will be the limiting factor. Measure your widest handlebar setup and add at least 10cm.
Bike cover fabric is measured in denier (D), which indicates the thickness of the individual threads. Here's the quick breakdown:
For two bikes stored outside year-round, you want a heavy duty bike cover in 420D or above. Thinner covers develop pinholes at stress points where handlebars and pedals press against the fabric. With two bikes creating twice the contact points, this happens even faster.
A cover can be made from the most waterproof fabric on the market, but if the seams aren't taped, water will seep through every stitch hole. This is the single biggest difference between a cover that actually keeps your bikes dry and one that just slows the rain down.
Taped seams have a waterproof strip bonded over each line of stitching. Double-stitched seams without tape look robust, but they're not waterproof. Check the product description carefully. If it doesn't mention taped seams, assume they aren't.
PU (polyurethane) coating on the inside of the fabric adds another layer of protection. Look for a waterproof rating of at least 3,000mm. Above 5,000mm is excellent.
This is a question that barely anyone answers, but it's something most cyclists worry about. The honest answer: it depends on how you position them.
Park both bikes facing the same direction with handlebars offset (one slightly forward, one slightly back). This prevents the bars from clashing. If you're particularly careful about paintwork, drape an old towel or piece of cloth between the two frames where they might touch. A heavy duty cover with some slack will sit loosely rather than pressing the bikes together, which also helps.
In practice, light contact between two bikes under a cover causes far less damage than leaving them exposed to rain, UV, and road salt. Corrosion and rust are your real enemies, not the odd scuff.
Every bike cover traps some moisture. On cool mornings, you'll often find water droplets on the inside of the cover. This is normal. The question is whether your cover manages it well or makes it worse.
Covers with built-in air vents at the top allow warm, moist air to escape rather than condensing on the inside surface. Without ventilation, you're essentially wrapping your bikes in a sealed bag. That moisture settles on chains, cables, and derailleurs, which are exactly the parts most vulnerable to corrosion.
If your cover doesn't have vents, lift it partially on dry days to air things out. A quick wipe of the chain with an oily rag once a week will also keep rust at bay.
A bike cover won't stop a determined thief, but it will stop an opportunistic one. According to the Office for National Statistics, over 77,000 bikes are stolen in England and Wales each year. That's roughly one every seven minutes. Around 62% of those thefts happen at or near the owner's home.
A cover removes your bikes from sight. Out of sight genuinely does mean out of mind for casual thieves scanning driveways and front gardens.
For added security, look for reinforced lock holes (metal or plastic grommets) that let you pass a chain lock or D-lock through the cover without removing it. Two lock holes, one at each end, let you secure both wheels. This also stops the cover from being pulled off in strong winds.
The base of the cover needs to grip the wheels and stay put. There are two common approaches:
For a large bike cover holding two bikes, straps are the better option. Wind catches a loose cover like a sail, and a cover that flaps creates pools of water on the fabric that eventually find their way inside.
A bike cover isn't the only option for outdoor storage, but it's usually the most practical one.
A heavy duty waterproof bike cover for 2 bikes costs a fraction of these alternatives and works anywhere you can lean two bikes. No installation, no planning permission, no fuss.
If you're after a cover that ticks these boxes, take a look at our bike cover range. For more on protecting your bike from the elements, our guides on the best waterproof bike covers for outdoor storage and how to store your bike outside without it rusting cover the topic in more detail. You might also find our complete guide to waterproof cycling accessories useful if you're kitting out for year-round riding.
Yes, as long as the cover's dimensions match. E-bikes are usually a touch longer and heavier than standard bikes but the frame size is similar. The 230cm length on our heavy duty cover gives enough room for most e-bike and standard bike combinations. If your e-bike has a long-tail cargo frame or an extended wheelbase, measure it first and add at least 20cm to the longest dimension before buying.
Yes, ideally. Putting a cover over wet bikes traps moisture against the frame and components, which speeds up corrosion on chains, cables and bolts. If you've ridden in the rain, give the bikes a quick wipe with a towel before covering. If you can't avoid covering wet bikes, lift the cover for half an hour the next dry morning to let things air out.
A 600D Oxford cover with taped seams will typically last 7 to 10 years in UK weather if you treat it reasonably. Lighter 210D or 300D covers tend to fail at stress points after a couple of seasons, especially with two bikes pressing against the same spots. UV is the main killer in summer and wind abrasion the main killer in winter.
You can, but it depends on the size. A wire basket or a small saddle pack will fit under most covers without trouble. Rear panniers and child seats add height and width, so you'll want at least 10cm of slack in every dimension. If the cover stretches drum-tight over a child seat, the fabric will wear through at the contact point within a few months.
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