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EZ Gains

EZ Disc Cover (650-B-C) 10-15 Watt Saving

EZ Disc Cover (650-B-C) 10-15 Watt Saving

Regular price £174.00 GBP
Regular price £179.99 GBP Sale price £174.00 GBP
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What's Included

  • Your EZ Disc Cover (650c) (both sides)
  • Fixing bolts – for securing the disc covers together
  • Cable ties – for fixing the disc cover to your wheel
  • Wheel Protection tape and binding screw stickers x 1 (Outer Wheel Protection Tape)
  • 4 x valve covers – to cover the valve opening - reusable up to 20 times as they are made from a high quality adhesive material.
  • Swirls purchased separately

Approximate Weight (Complete Set)

The EZDisc has all the aero benefits of the EZDisc SL. It's just 1/3 heavier on average at around 150-250g.

Fitting Instructions

Instructions: (Please follow picture instructions for best fit)

(Please follow picture instructions below for best fit)

Equipment and tools:
-EZDisc covers
-EZDisc fixing packs
-Sprocket spanner
-Snips
-For those with disc brakes you may need an allen key, crank tool or a specific tool for removing brake callipers, Your disc comes with a pack containing; cable ties, retaining screws, valve covers and electrical tape.

 (Disc brake wheels remove the Rotor, in most cases you can use your cassette remover or an Alan key)

Step 1:

Place drive side of the EZDisc "this is the flat side with cable tie holes in" mark around the disc on both side with a pencil.

Add electric tape provided overlapping the line by 2-3mm, place EZDisc down as centrally as possible avoiding spokes and with the valve showing "the valve does not have to be totally central in the hole, at the same time line up as many holes as possible with the spokes.  Once this is done secure firmly with fixing tape.

 

 

Step 2:

(some EZ Disc have an extra binding screw hole please line this up as well)

Now your EZDisc is central and secure with tape, thread the cable tie through one of the holes located by a spoke, then thread it back through the hole located next to it (this should come back past the other side of the spoke) and fasten it around an individual spoke if possible, work your way around the EZDisc but do not pull fully tight. 

"please look at below pictures"

Re check the position of the EZDisc and pull cable ties tight from opposite sides, please pull as tight as possible to secure EZDisc, once this is done snip excess cable ties leaving around 5mm.

 

Step 3:

Now offer non-drive side up and add EZDisc retainer bolts, these should nip up to the disc but not indenting the disc, use a screw driver to lightly screw tight, removed tape your EZDisc should now be solid on the wheel.

 

 

Step 4:

You do not need the rim tape in most cases but can add a nice finish, in some cases it helps hold the rim flat to the wheel. The rim tape is made from very high tack black vinyl cut in to shaped segments for EZ application.

Again the dots are not a vital part to the application, these can be added by placing the screw in the middle of the dot and applying heat using a hairdryer and working your finger around the bolt.

 

 

Step 5:

Replace your cassette and disc brake "if you have one" and get ready to join 4,000 other EZ Riders all over the world and save minutes of your bike leg.

 

 

Important note, your might find in some cases the EZDisc slightly pops away from the the rim, this can be rectified by using different size binding screws supplied, if not supplied we will be happy to send these out. Also the rim tape can help secure this in place. "smaller screws around valve"

 

"Please see below an example of how to inflate your wheel".

In nearly every case so far you do not need to remove your disc or any screws to inflate your tyre, or even use a valve extender, this is the same case with a CO2 canisters you just need to be a bit forceful, don't worry the EZDisc is extremely robust. If you find this is impossible then please feel free to contact us for advice, you also may need to consider a different valve length.

650 Wheel size, normally for small or extra small bikes.

This product has been wind tunnel tested (at Silverstone Sports Engineering Hub) and is as fast as a top end disc wheel, The EZDisc has all the aero benefits of the EZDisc SL, it's just 1/3 heavier on average at around 125g.

Aerodynamic rear disc wheel covers for road racing bicycles.
Turn your wheel into a disc wheel and enjoy meaningful performance gains.
Custom engineered to fit all makes and models of wheels, brakes, and rim depth options.

(Patent Authorise)

BTF-CTT Legal / Used in UCI Races / Ironman Legal

    View full details

    The Science

    EZDisc Wheel Cover 10-15 Watt Saving

    One of the first areas riders look to upgrade for aero improvements are their wheels. In time-trial and triathlon racing, many people equip their bikes with a completely covered rear wheel or a full rear disc wheel. This blocks all air from getting caught in the rear wheel and keeps it moving past quickly. On windy days, the disc may also create a sail effect, pushing the rider even faster. But bolting one of these on is not cheap. Just that rear wheel alone can cost anywhere from (£1,000 to £4,000).To make this rear wheel advantage more accessible to the masses, the team at EZ Gains has created an elegant solution to this problem. They’ve developed a simple cover made of durable and lightweight material that slips over your existing wheel, connecting securely and creating the SAME aero gains as if you purchased a fancy rear wheel. In fact, some testing suggests that depending on the wheel you install it on, the cover may perform better than a full disc wheel due to the fact of what quality hub you have, cheap disc wheel or old one often means cheap or poor-quality hub, this means if you already have a good quality wheel and add the EZ Disc this can enhance your gains, as the aero gains between and Disc and EZ Disc identical. Testing this out ourselves, we found that installation was quite simple and could be done at home with the appropriate tools (most will need a lock ring tool). Once on the bike, the feel and performance was evident. It really showed its stuff on those fast descents, capturing an extra mile or two per hour in comparison to our 80mm deep section rear wheel.

     Wind Tunnel EZDisc Aerodynamics Testing

    The EZDisc was tested at Silverstone Sports Engineering Hub and compared to a top end disc wheel “graph below at 40kph, the orange line is a EZDisc with a lower CDA".

    Tests 31st January 2023 using rim tape and a rider holding the exact position within the green lines set out from base ride.

    The idea was to validate that putting one of these covers on your wheel actually makes you faster. Spoiler – it does! We had an array of quality carbon wheels of different depths with EZDisc covers for each, one aluminium box rimmed training wheel, one relatively cheap disc wheel and one relatively expensive disc wheel to play with. The test itself was with the wheels on my TT bike, with the wheels spinning, without a rider. Why? The rider adds far more drag than a wheel so unintentional movements can mask the differences the wheels make. We tested with wind speeds of 30, 40 and 50kmph, with wind angles of -15 degrees through to 15 degrees. The results were unequivocal! This graph shows lines, one per wheel, for the aerodynamic drag (the “CDA“), including the bike, against the wind angle (the “yaw”). It’s averaged across the wind speeds. The lower the CDA, the better. As you’d expect the training wheel performed worst (the top line in dark grey).Then there is a group of all the carbon wheels. Surprisingly the depths from 38 to 88 all performed similarly, with the deeper rims just outperforming the shallower ones at higher yaws. Then there is a grouping containing the real disc wheels and the disc wheels with covers. There’s very little difference between these. These distinct groupings show the disc covers improving the aerodynamics of the wheels up to the same performance as normal disc wheels! Bearing in mind these are a fraction of the cost, this is a pretty big finding! What do those figures mean in terms of racing? Plugging the differences between the wheels with and without the disc into a calculator or directly using the formula you can work it out the saving.

    The above tests were conducted not using the rim tape in 2021 and without a rider.

    That’s a pretty impressive improvement, especially considering these were some pretty high-end wheels to start off with. Comparing the aluminium box rim training wheel to the 88mm with an EZDisc cover or real disc wheels, you can see it’s practically the same time savings EZ Disc / 88mm / 20mm "its clear difference with an EZ Disc. We also in the earlier days used Aero Weenie to crunch the numbers from our tests, this is in real world 

    Outside Testing

    For our formal testing we manage all the variables as best we can. We conducted our repeat runs on the same hilly route, on the same day with one rider on one bike, just changing the rear wheel from a standard one to one with an EZDisc fitted.

    When testing out door you will always get a more positive result then the wind tunnel testing as you will also have a "push factor" from side and rear winds, any front winds will travel over a smoother surface faster.

    We have now also had feedback for 100s of riders with over 5,000 EZ Disc riders confirming the below average time savings.

    EZ Disc TT Bike (Real World Data)

    90k TT Bike Ride

    180k TT Bike Ride

     

    Buy the EZ Disc Rear Wheel Today!

    Customer Reviews

    Based on 2 reviews
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    N
    Nick Kenyon-Muir
    Ironman bike course PB

    Easy to set up. Used on IM Copenhagen, along with chainring cover, and helped to get a bike course PB of 13 minutes. Good to train on as well and handling ok with sidewinds.

    That's totally awesome Nick and thanks for talking the time to do the review.

    w
    william brierley
    Wheel cover

    Great service .answering all my emails quickly the disc covers look great not fitted as there a xmass present. Should be using them in February a tt called the ice breaker.
    Thanks

    Thanks William.