WattShop FAQs

For dual riser stack basebars, if your riser stacks are flat topped then yes, the Anemoi Mk2 extensions will be compatible. Further to this we have different Build Options which offer different levels of integration and different adjustment windows. To understand more we recommend reading our Extension Build Guide document. Available via our Technical Resources page.

For mono riser stack basebars we currently only offer compatibility with the basebars/bikes listed on the product page. Due to the unique interfaces, we design a basebar specific bracket for each mono riser stack basebar.

Initially you need to determine which handgrips are compatible with your shifter model. You need to know the specific model name or number. For example is it Shimano R9150 or Shimano R9160, or is it SRAM Clics or SRAM wireless Blips. Once you have this information you can work out the handgrip style available for your shifter model.

Handgrip style is a question of personal preference. Each handgrip provides different contact patches and different heights/reaches are possible. Please refer to the Anemoi Mk2 Build Guides, found on our Technical Resources page, for more information.

There is no set answer. Savings are individual to each athlete. What performs well for one athlete may not work well for another.

As a rough guide, from data collated across all of our tests, you can expect to see a saving of between 0.003-0.006m^2. This is when compared against a standard 22.2mm round pole extension setup.

To convert the CdA saving into watts saved, please refer to our Geek Sheet calculators. You'll need to know your target speed and expected air density.

The Anemoi basebar is compatible with your bike if it meets the following criteria:

1) A traditional steerer diameter of 1 1/8" (28.6mm) or a diameter of 1" (25.4mm). With the latter a converter sleeve would be needed.

2) Has a traditional standard straight top tube steerer or a dropped headtube. The latter only if the centre of steerer to front of the head tube is no greater than 46mm.

For information on stem selection, please refer to our Build Guide, available through our Technical Resources page.

If you are using one of our conversion spacers we recommend pairing these with the inline pole clamps for optimal forearm to extension pole alignment.

If you are not using the conversion spacers, we recommend using our pole clamp selection tool (available in from our Technical Resources page). This will determine the optimal pole clamp to align your forearms with your desired armrest width depending on your riser stack lateral centres.

For a range of dual riser stack basebars, we offer our conversion spacers. These are profile-matched spacers that convert the OEM basebar/stack to match the WattShop product range.

For mono riser stack basebars, we offer a range of brackets specific to each basebar. This offers a clean connection between the OEM basebar and our WattShop product range.

Lastly, we also offer Delta risers. These are custom risers (or brackets) to profile match your existing basebar to our Anemoi extensions. Eliminating all adjustment ranges to create a one-piece interface between the basebar and the extensions.

There is no right answer as the choice is very much down to personal preference. As a guide, we suggest using our single-sided armrests for overall armrest widths of 220mm or less. And dual sided armrests for overall armrests greater than 220mm.

For reference, our modular armrests are a single-sided design.

Yes. In the first instance, please refer to our UCI regulations page. This will guide you as to what UCI category applies to you. If you are category 2 or 3 please ensure you have registered with the UCI.

In terms of our product range. The Anemoi extensions UCI compliance information can be found in the Build Guide (see Technical Resources). Riser angle is dependent on height category, extension length and handgrip style. Whereas reach will depend on your frame reach, stem length and doing the maths on the extension lengths. Information is made available in the Build Guide. This can be quite complex so please get in touch if you need assistance in determining the optimal component selection to maximise your setup within your UCI category.

The Minimoi extensions/cockpit is highly variable due to the nature of the extension pole mounting. In this case it is imperative you familiarise yourself with the UCI regulations and perform the necessary dimensional checks. Our UCI tool is recommended for checking UCI compliance at home.

It'll depend on whether you're looking at our Minimoi Mk2 extensions or the Anemoi Mk2 Extension System.

For the latter, compatibility is only possible with the basebars for which we offer a bracket. Our list of brackets is available on the product page.

For the prior, if your existing mono riser stack offers a "pad mount". You can pair our universal adjustable riser with one of our pole clamp options. This switches the setup to our Minimoi cockpit. However, please note that the old pole clamps may not be removable and will be left redundant in this arrangement. Alternatively, you could pair the Minimoi cockpit with one of our bracket options, in which case compatibility will be limited to the list of brackets we have available.

If using in conjunction with our conversion spacers, mount plates, mono brackets or Anemoi basebar then select the basebar adjustable riser. It is a simpler and quicker installation.

If mounting directly to a flat topped riser stack or pad mount, select the universal adjustable riser.

Each of our brackets come in five different sizes; extra short (XS), short (S), medium (M), long (L) and extra long (XL). The sizing relates to the rear riser bolt hole. Assuming this as the reference point, +/-0mm, each bracket "adjusts" the reach by the following:

XS = -40mm to -20mm

S = -20mm to +/-0mm

M = +/-0mm to +20mm

L = +20mm to +40mm

XL +40mm to +60mm

For the Anemoi extensions it is important to determine the correct bracket size. For the Minimoi cockpit, due to the extension pole mounting, determining bracket size is not as important.

In some instances if you get in touch we can offer a XXL bracket. But we do not offer any brackets longer than +80mm reach due to the increased leverage and loading the bracket is subjected to.

To determine compatibility with your BB/frame please use our Cratus Crank build guide, available through our Technical Resources page. You need to determine that:

1) You have the correct diameter bottom bracket. Currently our Cratus crank is only compatible with 24mm or 30mm diameter spindles.

2) The spindle length is wider than your BB shell width.

3) The crankarm will clear the frame's chainstay.

It's difficult to give values as they will depend on which crankset you are moving from, which spindle option you select and the crank/frame/rider leg relationship.

Putting aside any aerodynamic benefits of the crank profile and looking purely at the benefits of the narrower Q-factor. Although very much rider dependent, you can expect to see a saving of 0.001-0.002m^2 per 10mm narrower Q-factor.

Taking your current crank's Q-factor (likely to be in the range of 145-150mm), and comparing this to the spindle dependent Q-factors of the Cratus crank, you can work out the Q-factor saving. For example, if you have a 145.5mm Q-factor SRAM crank and you swap to our 30mm spindle Cratus crank, this has a Q-factor of 124.5mm. That's a 21mm difference which equates to a CdA reduction of 0.0021-0.0042m^2.

With this information you can work out the watts saved for your specific speed and air density by using our Geek Sheet calculators.

This will depend on your current bottom bracket. If you currently have a 24mm or 30mm bottom bracket we recommend selecting one of our 24mm or 30mm spindle options. However, if you are using the crank on the track, we highly recommend swapping to a 30mm bottom bracket so you can use our narrowest spindle for optimal performance.

If you already have another bottom bracket installed, such as GXP or DUB (28.99mm), you will need to swap the bottom bracket to 24mm or 30mm.

This will depend on the Q-factor you're looking to achieve and also compatibility with your BB/frame.

To determine compatibility with your BB/frame, please use our crankarm dimension guide available through our Technical Resources page. You need to ensure the spindle length is wider than your BB shell width and that the crankarm will clear the frame's chainstay.

We also recommend giving consideration to chainstrike between chain and crankarm when using the bottom sprocket in your cassette.

Please note our SRAM spindles are only available in DUB (28.99mm diameter). We do not offer compatibility with GXP, 24mm or 30mm bottom brackets. Assuming you already have the SRAM spider installed, it is very likely that you already have a DUB spindle. This means you can continue to use the same bottom bracket.

Our SRAM AXS/Quarq crankarms are only compatible if you have the 8 bolt spider or 8 bolt direct mount chainring.

If you do not have the 8 bolt mounting the crankarms will not be compatible.

For certain spiders, such as the Power2Max Open Source spider we offer adapters that convert the spider to match the 8 bolt requirement.

Our crankarms are designed specifically for the brand and model they are named after.

They can not be used with different model spiders due to differences in the spline interface.

Crankarms are only compatible with the brand/model mentioned in the name.

Although very much rider dependent you can expect to see a saving of 0.001-0.002m^2 per 10mm narrower Q-factor.

We give brand and model specific figures on the relevant product pages. We also provide watts saved figures based on different speeds. If you want to use this information to determine the watt saved for your specific speed and air density, please refer to our Geek Sheet calculators.

Chainstrike can be caused by different variables. The easiest way to eliminate chainstrike is to move spindle spacers from the non-driveside to the driveside. This reduces the chain angle and in turn helps to eliminate chainstrike.

If the issue persists and you have the narrow spindle, the standard spindle option has more flexibility in its spindle spacer setup which can be used to eliminate the issue.

Typically, around 250-400km of dry open road use. This will be noticeably longer on the track, and shorter in the rain or in extreme temperatures (+40 °C). After this period, you can send your chain back to us to be re-waxed.

Delta is our range of custom componentry that is designed and manufactured to your exact specification to suit your specific needs.

Our Delta product range is designed to optimise your cockpit specifically to you and your needs.

Whether extensions or risers, the key aspect of the design is to improve aerodynamic efficiency by optimising profiles and reducing drag inducing interfaces. In the case of the Delta risers our testing has shown CdA savings of up to 0.003m^2.

The one piece design reduces part count, locking in the riser angle, reach, width, stack and toe-in for a fully custom solution. Your specific needs met with one custom extension or pair of risers.

Yes. We appreciate the dimensions can be difficult to interpret. Please reach out to us at info@shopforwatts.co.uk and we can arrange a video call to work through the required dimensions.

Currently we are only offering the service to users of our Anemoi Mk1 or Mk2 extensions. This is because we have the interfaces for these two products and can understand the implications of changes to the riser angle and reach.

Yes. We ship worldwide. Please view our Shipping and Returns page for further information.

If you are having issues at checkout with our system not accepting your address or providing you with any carrier service, please email us at info@shopforwatts.co.uk for a quote.

I'm afraid it isn't currently possible to collect from WattShop HQ.

We have a handful of WattShop stockists worldwide. If you would like your local bike store to stock WattShop products, please ask them to get in touch with us at info@shopforwatts.co.uk.

Yes. We're always looking for more bike shops and fitters to stock WattShop products. Please send us an email at info@shopforwatts.co.uk.

There are many variables at play from equipment selection and rider CdA through to course conditions. While there are tools being developed to accurately predict rider times.

We suggest checking out www.mywindsock.com. MyWindsock is an advanced tool available to all, and if you're a UK TTer, it has a library of UK time trial courses!

The answer will depend on air density and speed. Use our Geek Sheet calculators to work out the watt saving for a given CdA at a set speed and air density.

Sourcing the CdA reduction of a product is more important than understanding the watts saved. Watts saved is irrelevant if the air density or speed is not given.

Whereas with a given CdA you can work out the watts saved at different speeds at different air densities.

Check out our Geek Sheet calculators. You can work out the savings specific to your race conditions.

The common belief is that lighter is faster, however, in the majority of scenarios, aerodynamic savings should be prioritised over weight.

It matters very little how heavy a product is; aerodynamics trump weight in almost every scenario.

So when does weight matter?

There are complexities and variables, but as a generalised answer, for pro cyclists, the average gradient needs to exceed 7.5% for weight to be more important than aerodynamics. That’s 7500m of climbing per 100km. That just doesn’t happen in a road race or time trial, ever.

We urge you to disregard the weight of any product; instead, ask the question, “how aero efficient is it?”

Pound per watt (£/w) is an effective way of giving your prospective purchase context. And is especially useful when comparing to other products.

Trying to find comparable information from different brands can be tough so you may need to use our Geek Sheet calculators to pull down the watt saving that's relevant to your target event. Once you have this divide the cost by the watts saved to find your £/w. Aim for the lowest cost per watt.

We also have a handy £/w tool on the same Geek Sheets page to save you the math.

Don't leave low hanging fruit on the table!

The rider accounts for roughly ~70-75% of drag so we'd always recommend optimising your position on the bike first. Aero tests are incredibly good value for money when it comes to optimising position. You might not be able to see aero but certainly you'll see the difference on the result sheet!

Our Performance Engineer will be in touch before your test to discuss your aims and objectives for the session. They will let you know about any specific items that should be brought along. Please bring all the spacers/bolts for your bars, and your bike set up in full race mode including everything you normally race in be it race wheels, skinsuit, overshoes / calf guards, gloves etc.

We stock a range of equipment for testing, including 22.2mm extensions, a range of stems, various hydration systems, several helmets, and several skinsuits/overshoes. If you want to test something specific please mention it in your call and bring it with you.

Finally, if there is something specific you might want to test but don’t have, let us know and we’ll try and source one for your test.

No, it’s not a problem and most riders take to the track very quickly. At the beginning of the session you will have the opportunity to warmup and acclimatise yourself to the velodrome. Within a few laps it will become second nature.

This is not a problem, we have 2 rear wheels fitted with Powertap hubs (10/11 speed) for clients to use in aero tests. If it is a track bike you wish to be tested on and you don’t have a powermeter, please contact us and we can find a solution.

Yes, it’s absolutely worth coming! If you are going along at 60kph or 40kph you will still be using the majority of your power to overcome aerodynamic drag. For example, if you have a 10mile TT PB of 23 minutes (26mph average), at that speed over 85% of your power is used to overcome aerodynamic drag.

Aero testing isn’t only for professionals or those fighting for the win. We have extensive experience testing a range of riders, from those looking to dip under 24 minutes for a 10-mile TT, all the way up to multiple Olympic champions. A reduction in aerodynamic drag will make you go faster no matter what speed you’re going at! So, don’t be shy, tell us your goals and we can help you achieve them!

If you wish to book an aero test session, please email info@shopforwatts.co.uk. At this point you will be given the latest track availability, as well as the invoice for your aero test. As soon as you have paid the invoice, we will contact the velodrome to book your track time. Once we have received confirmation that the session is secured, we can start planning your aero test!

We stock a range of helmets for clients to use during aero sessions. If you have a specific helmet you wish to test, please let us know and we will try and source one!

During the test, we will always follow the data, as such we may need to change the extensions. If you are unable to fit standard 22.2mm extensions please contact us and we can find a solution before the test.