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Monod Sports

Mammut Assist Belay Resistor

Sale price$139.00 CAD
Assisted belay resistor for managing lead climbing weight differences in the gym and at the crag.

Only 1 unit left
Colour: Gold
Assist Belay Resistor
Assist Belay ResistorGold Sale price$139.00 CAD

Product Details

The Mammut Assist Belay Resistor is built for one of the more common real-world belay problems: climbing with a partner who is significantly lighter or heavier than you. It attaches to the first quickdraw and increases rope friction so a lighter belayer can more effectively catch and hold a heavier lead climber’s weight. In use, the patented cam mechanism activates only during a fall or while lowering, so you still get dynamic belaying and easier rope feed when the system isn’t under load.

That balance is what makes it practical. The Assist helps equalize weight differences up to 35 kg when clipped to a quickdraw, or up to 45 kg in Boost Mode when attached to the first bolt with a locking carabiner for faster engagement. It’s also designed to activate even when only the first quickdraw is set, which helps reduce the risk of groundfalls. For gym sessions and sport days where partner weights don’t line up neatly, it’s a straightforward tool that adds control without overcomplicating the belay.

Specs and features

Style #: 2040-03050

Features

  • Activates only when needed for smooth handling.
  • Dynamic belaying is still possible.
  • Allows easier, controlled lowering of heavier climbers.
  • Easy to release once activated.
  • Attaches to the first quickdraw.
  • Features Boost Mode: Attach the Mammut Assist Belay Resistor to the first bolt using a locking carabiner, allowing for faster engagement with larger weight differences.
  • Activates even when only the first quickdraw is set, reducing the risk of groundfalls.

Compatibility

  • For single ropes: 8.7-11.0mm.

Weight Difference Allowance

  • Up to 35kg.
  • Increases to 45kg in Boost Mode.

Best For

  • Suitable for gym climbing and sport climbing.

Awards

  • ISPO Award Winner.
Shipping & Returns

We offer free standard shipping within Canada on orders over $99. Orders ship from our store in Banff, Monday through Friday. Most orders are processed within two business days, with orders placed after 12 p.m. MST requiring an additional business day. Once your order ships, you’ll receive tracking right away. We currently only ship to Canadian addresses - Learn more.

If something isn’t quite right, most online orders can be returned within 14 days as long as items are unused and in original condition. Refunds are issued to the original payment method once items are received back in-store, with in-store returns always free and a small return shipping fee applying to mailed returns - Learn more.

In-Store Pickup

All items are available for in-store pickup at our Banff location. Orders are typically ready within an hour during business hours, and always within 24 hours. Simply select in-store pickup at checkout and we’ll have it waiting for you at 129 Banff Avenue.

Best Price Guarantee

If you find the same product for less at a Canadian retailer, we’ll match it — or beat it. The item must be identical, in stock, and sold in Canada at a publicly advertised price. If you’ve already purchased, we’ll refund the difference on eligible orders within 15 days - Learn more

Why you'll love it

BALANCES WEIGHT

Built to help manage partner weight differences so a lighter belayer can catch and hold a heavier lead climber more effectively. It allows for mismatches up to 35 kg, or up to 45 kg in Boost Mode.

FRICTION ON DEMAND

The cam mechanism activates only during a fall or while lowering, increasing rope friction when it matters. That keeps rope feed smoother and still allows dynamic belaying.

QUICKDRAW SETUP

It attaches to the first quickdraw for a simple setup in the gym or at the crag. It can also activate when only the first quickdraw is set, helping reduce the risk of groundfalls.

We're here to help

Frequently asked questions

We’re here to help with the details, before and after you order.

Visit Help Centre
When will my order ship?

Most orders leave our shop within 1–2 business days. Once your order is packed and scanned by the carrier, you’ll receive tracking right away.

What if the size or fit isn’t right?

No stress, it happens. If something doesn’t fit the way you expected, most items can be returned within 14 days as long as they’re unworn and in original condition. In-store returns are free, and mailed returns include a small return shipping fee. Some conditions do apply. Return Policy.

Is this covered by a warranty?

Most of our products are backed by the manufacturer’s warranty. If something goes wrong, we’ll help guide you through the process and advocate on your behalf.

Do you price match?

Yes. With our Best Price Guarantee, if you find the same product for less at a Canadian retailer, we’ll match it — or beat it. No hoops, no hard feelings, just fair pricing. Learn more.

BORN IN BANFF, BUILT BY A FAMILY OF MOUNTAIN enthusiasts AND GEAR SPECIALISTS.

Monod Sports is a family-owned specialty shop rooted in Banff, since 1949. Our team lives and works in the mountains, and we’re selective about what we carry — choosing quality gear we trust ourselves, stand behind fully, and feel confident recommending to anyone who walks through our doors.