If you're looking for hydration between the arms, start with our BTA system. Choose High-Sided Armrests for extra support or UCI Armrests for UCI race compliance. The mount plate width depends on how far apart your armrest bolts are: Medium fits 52–148 mm, Wide 130–198 mm and Extra Wide 167–235 mm.

No. The BTA system mounts on AeroGain mount plates only, even where another brand's plate has the same bolt spacing. There is no adapter. The plate is also sold on its own.

Measure outside to outside across the two outermost bolts that hold your armrests:
• Medium: 52–148 mm
• Wide: 130–198 mm
• Extra Wide: 167–235 mm
Between 167 and 198 mm both Wide and Extra Wide fit. Watch how to measure.

The plate's bolts stick out below it, so your extensions need a gap between them. It does not fit the Specialized S-Works Shiv Tri, Argon 18 E-119 or Cervélo P5.

Yes. To keep the bottles level when your extensions are tilted, match the spacer angle (10°, 15°, or 20°) to your cockpit tilt. Custom angles are also available upon request.

Yes — as long as you match the spacer angle to the angle of your mount bracket, your bottles will stay horizontal and secure.

Yes. All AeroGain BTA spacers, whether straight or offset, are designed to allow mounting a standard bottle cage securely on top.

Yes. We offer spacers in 70mm and 90mm heights as standard. Tilt options include straight, 10°, 15°, and 20°. Custom heights and angles are available upon request.

If you are replacing an existing spacer, look for markings on the top of your current spacer. If buying a new setup, simply choose 70mm or 90mm depending on your fit needs. Custom heights are available.

No. We recommend selecting a single spacer that meets your required height and tilt rather than stacking multiple spacers.

Yes. The height and tilt angle of each spacer are engraved or printed on the top surface for easy identification.

The default double bottle system height is 95mm. Contact us if you require a different height configuration.

Our products are designed to be compatible with a wide range of bikes and aerobars. For full details, check the product description or contact us directly if you are unsure.

We offer two High-Sided armrest versions: the 124mm version is UCI-compliant for racing under UCI rules, while the 140mm version is not UCI legal and is designed for maximum support outside UCI restrictions.

Yes. If you prefer UCI-legal armrests, simply leave a note at checkout and we will swap them for you before shipping.

We hope you'll love your AeroGain products, but if you've changed your mind you can return them:

• Return or exchange any item within 30 days of receiving it.
• Items must be unused, in the condition you received them, and in their original packaging.
• Custom-built and made-to-measure products, sale items and gift cards can't be returned.
• Start your return or exchange in our return portal. You pay the return shipping fee there and can print your return label straight away.

Defective, damaged or wrong item? We replace it at no cost — start here.

Crashed and broke an AeroGain product? You get 40 % off a similar product to replace it — email info@aero-gain.com with your order number and a photo.

Outside Denmark we ship with FedEx Express: 2–4 working days to most of the world. In-stock orders leave our workshop within 1–2 working days. Tracking is emailed as soon as your order ships.

It depends on where we ship to. The banner at the top of the page shows the shipping offer for your country, and the exact cost is shown at checkout before you pay. All rates are in our shipping policy.

No. US prices include all duties and tariffs - nothing to pay on delivery.

Yes. A tracking number is automatically emailed to you once your order ships.

Yes. All items in one order are shipped together. If you place multiple orders close together, contact us and we will try to combine them.

Yes, we ship worldwide with FedEx Express, 2–4 working days. The exact cost is shown at checkout.

Yes, if your order has not yet shipped. Contact us immediately to change or cancel.

Yes. Contact us before ordering if you would like to pay via bank transfer. Otherwise, we accept credit cards and PayPal online.

Yes. Discounted bundles are available, or contact us if you want to create a custom combination.

Yes. Add a note during checkout, and we will customize your order accordingly before shipment.

Yes. We offer special support and discounts for bulk or team orders. Please contact us for a quote.

Yes. The spacer is cross-bolted: bolts run through the body and are held by nuts, so the whole block is clamped together. The carbon plate is held by your armrest bolts, so tighten them to your cockpit maker's torque and check them before every ride for the first weeks.

Yes. All AeroGain components are designed specifically for high-performance racing.

Usually not necessary, but if you have a unique setup, sending photos can help us assist better.

Guides are linked on each product page. Contact us if you need additional help.

Contact us immediately via website chat, and we will help resolve it.

You can reach us anytime via the form below.