Mammoth – Sram AXS

The shorter-travel trail bike built to climb efficiently, descend with confidence, and keep you fresh for long days on the trail. The Mammoth is our downcountry trail bike for riders who want long-ride efficiency without giving up confident handling on the descent. Designed for big trail days on routes like Buffalo Creek and the 401 in Crested Butte, it delivers the climbing traction, stability, and plush ride quality needed for technical terrain and fast, demanding miles.

Overview

If you want a bike that feels fast on the climb, controlled on the descent, and comfortable deep into the ride, the Mammoth is built for that balance. It shares the sure-footed character of the Behemoth, but with 110mm of rear travel and 120–140mm of front travel for lower weight and greater efficiency when longer travel is not necessary. The result is a trail bike that handles long, steep climbs with traction and composure, then rewards you with stability and control when the trail turns rough or speed picks up. On slow technical sections, the Mammoth stays precise and maneuverable. On faster descents, it gives you a more planted, in-control feel that encourages you to ride farther and faster.

Why riders choose the Mammoth

  • Efficient for long trail rides with a shorter-travel platform that climbs cleanly and carries speed well
  • 110mm rear travel with 120–140mm front travel for a lighter, more efficient alternative to longer-travel bikes
  • Body-optimized geometry for traction, balance, and confidence on long, steep climbs
  • Plush descending feel that smooths small bumps while maintaining control at speed
  • Progressive rear suspension for a supple initial stroke and enhanced pedaling efficiency
  • Super short chainstay for maneuverability and responsive handling
  • Designed around 1x drivetrains for a clean, modern trail setup
  • Versatile tire clearance for a wide range of tire size options
  • 100% handmade in Colorado with the precision and care that define our Custom Bikes

Ride feel

The Mammoth is made for riders who want trail-bike capability without unnecessary travel. Its progressive spring curve gives the rear suspension a super supple feel over small bumps, while preserving the support and stability that matter when you are putting power down. That means less trail chatter, fewer pedal strikes, and more confidence when you are climbing, cornering, and descending. It is a bike that feels composed in technical terrain, responsive in tight sections, and impressively stable when speed increases. For riders who want to stay efficient without sacrificing ride quality, the Mammoth hits a sweet spot. Customize your bike: This package features Sram AXS 12 speed wireless electronic shifting. Choose your options below to build your bike the way you want it. You can choose your suspension, groupset, brakes, wheels, tires and then customize your paint job to make your bike as unique as you are. Contact us with any questions. Once you place your order, we will send an itemized list of parts and work with you to dial in the frame and accent colors.*Components in photos are not exactly what is listed. We reserve the right to make substitutions of equal or greater quality based on availability. More complete bike photos are coming soon with different colors. 
  • Optimized for tires from 2.4″ to 3.0″
  • Trail Optimized Geometry
  • Handmade Lightweight Aluminum frame
  • 110mm rear travel
  • 120mm, 130mm, or 140mm fork travel options
  • Rear Shock Spec: 210x55mm with 25.4x8mm mounting hardware
  • 12x148mm rear through axle. Axle included in frame price.
  • 30.9mm seatpost diameter
  • Internal brake, shift, and dropper cable routing
  • 44/49 Tapered Headtube
  • 73mm BSA threaded bottom bracket shell
  • 3.0″ max tire clearance
Please note! All Lenz Sport frames are hand-made in Colorado. They are not factory built on an assembly line. Designs evolve iteratively, per Devin’s expertise and judgement. Specifications may vary, and are subject to change without notice.
 Lenz Bike Geometry Comparison Chart- compare the Sesh, Mammoth, Behemoth, and Lunchbox

Our frame size is now the Reach measurement. We no longer use size labels since they are irrelevant. *Focus on rider height, reach, RAD, and Standover (SO) when choosing size. RAD = Height in mm times .447. Click here for more information on Ridelogic frame sizing and to submit measurements, or come into our shop for a fit. Once you nail down Reach and Standover, choose your bike based on how much travel you want.
MODELMammothMammoth  MammothMammothMammoth 
REAR TRAVEL110110110110110
FRONT TRAVEL120-140120-140120-140120-140120-140
RIDER HEIGHT 5’2″-5’6″ 5’5″-5’10” 5’10”-6’1″6’0″-6’3″6’4″-6’8″ 
Frame Size:
REACH
420 430 440 460 475
STACK625625635 645655
RAD720-790745-805760-820780-860850-920
SO690 690710 720745
HA65 6565 6565
TT575 594610 630650
BB – 3″tire340 340340 340345
BB – 2.6″tire330330330330335
BB – 2.4″tire320320320320325
HT102 102115 127140
CS-29422 422422 422422
CS-27.5412 412412 412412
SA77 7777 7777
WB1180 12001215 12351255

Description

The shorter-travel trail bike built to climb efficiently, descend with confidence, and keep you fresh for long days on the trail.

The Mammoth is our downcountry trail bike for riders who want long-ride efficiency without giving up confident handling on the descent. Designed for big trail days on routes like Buffalo Creek and the 401 in Crested Butte, it delivers the climbing traction, stability, and plush ride quality needed for technical terrain and fast, demanding miles.

Overview

If you want a bike that feels fast on the climb, controlled on the descent, and comfortable deep into the ride, the Mammoth is built for that balance. It shares the sure-footed character of the Behemoth, but with 110mm of rear travel and 120–140mm of front travel for lower weight and greater efficiency when longer travel is not necessary.

The result is a trail bike that handles long, steep climbs with traction and composure, then rewards you with stability and control when the trail turns rough or speed picks up. On slow technical sections, the Mammoth stays precise and maneuverable. On faster descents, it gives you a more planted, in-control feel that encourages you to ride farther and faster.

Why riders choose the Mammoth

  • Efficient for long trail rides with a shorter-travel platform that climbs cleanly and carries speed well
  • 110mm rear travel with 120–140mm front travel for a lighter, more efficient alternative to longer-travel bikes
  • Body-optimized geometry for traction, balance, and confidence on long, steep climbs
  • Plush descending feel that smooths small bumps while maintaining control at speed
  • Progressive rear suspension for a supple initial stroke and enhanced pedaling efficiency
  • Super short chainstay for maneuverability and responsive handling
  • Designed around 1x drivetrains for a clean, modern trail setup
  • Versatile tire clearance for a wide range of tire size options
  • 100% handmade in Colorado with the precision and care that define our Custom Bikes

Ride feel

The Mammoth is made for riders who want trail-bike capability without unnecessary travel. Its progressive spring curve gives the rear suspension a super supple feel over small bumps, while preserving the support and stability that matter when you are putting power down. That means less trail chatter, fewer pedal strikes, and more confidence when you are climbing, cornering, and descending.

It is a bike that feels composed in technical terrain, responsive in tight sections, and impressively stable when speed increases. For riders who want to stay efficient without sacrificing ride quality, the Mammoth hits a sweet spot.

Customize your bike:

This package features Sram AXS 12 speed wireless electronic shifting. Choose your options below to build your bike the way you want it. You can choose your suspension, groupset, brakes, wheels, tires and then customize your paint job to make your bike as unique as you are. Contact us with any questions. Once you place your order, we will send an itemized list of parts and work with you to dial in the frame and accent colors.*Components in photos are not exactly what is listed. We reserve the right to make substitutions of equal or greater quality based on availability. More complete bike photos are coming soon with different colors. 

Reviews

There are no reviews yet.

Be the first to review “Mammoth – Sram AXS”

Pricing / Order

$5,883.00

Share on facebook
Share on X
Pin this product
Email this product

Related products