Mammoth Frame

lenz mammoth 29 plus mountain bike 4" travel

Description

The Lenz Sport Mammoth is our shorter travel downcountry trail bike made for long trail rides where longer travel is not necessary. This Lenz plus bike is built for efficient climbing and fast descending on trail systems like Buffalo Creek or the famous 401 trail in Crested Butte Colorado. The Mammoth is similar to the Behemoth but with 110mm rear travel and 120 to 140mm front travel for reduced weight and better efficiency over long rides. We are continuously evolving the full suspension plus bike. This bike is going to be the go to bike for many riders out there who aren’t riding drops and super chunky trails, but still want the many benefits of a plus bike and our famous trail optimized geometry enabling the rider to aggressively ride and maneuver any trail feature that presents itself. The Mammoth has incredible geometry and traction for climbing long steep  trails and a plush ride quality for fast descents. The stability of this Lenz Bike will impress any rider on slow technical trails, and you will feel more in-control at high speeds than ever before. You will love the handling, climbing, cornering, and descending characteristics and you can say goodbye to annoying pedal strikes. With our updated progressive spring curve rear suspension in a shorter travel, you get a super supple suspension that eats up the small bumps and has enhanced stability for greater pedaling efficiency. In a nutshell, the Mammoth will help you ride longer and faster and keep your body fresh for the next day. The Mammoth features our famous super short chainstay is designed for maneuverability and to be specific to 1x component groups. The Mammoth frame is 100% handmade in Colorado.

Mammoth Frame

$2,650.00

Order and Building Process

All Lenz Sport frames are handmade-to-order. We fabricate every single part of the frame in house down to the bolts, dropouts, pivots, and cable guides. Quality of craftsmanship and riding performance is the number one focus at Lenz Sport, not super fast delivery times.  Any lead times provided are estimates and are not guaranteed. One thing we can promise is that it will be worth waiting for!
A 50% non-refundable deposit is required to order either a frame or a complete bike.
Base price shown is for the frame and rear axle only. Please select rear shock and finish options and size below. You may order your frame and pay for it in full by choosing “add to cart”, or contact us to pay only the required 50% deposit.

 

Frame Price

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Frameset:

  • Rear axle included
  • Rear shock not included

Fill out this form to request a quote for a complete bike.

We offer customized build kits for all Lenz Sport mountain bikes. We can build bikes with Sram, Shimano, or TRP drivetrain. We also offer Magura, Shimano, Sram, Hayes, TRP, and Hope Brakes. We typically build the wheels from scratch using Hope, Onyx, or DT swiss hubs and we can get other hubs if desired. Rims are dependent on desired tire size and we offer Sun Ringle, Stans, DT swiss, Derby Carbon and more. For cockpit components, we love Oneup and Fox dropper seatposts, Protaper and SQlab handlebars, and SQlab grips and saddles. For suspension we love DVO, Fox, and Rockshox and have other available options as well. We understand that each rider has their own component preferences so please let us know yours and we will fill in the gaps with our own recommendations.

**NOTE: Complete bikes range from $5500 to $10,000 depending on component choices


  • 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″ 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.
MODEL Sesh Sesh Mammoth Behemoth Lunchbox Mammoth  Behemoth  Lunchbox  Mammoth Behemoth Lunchox Mammoth Behemoth  Lunchbox Mammoth  Behemoth Lunchbox
REAR TRAVEL 130 130 110 140 160 110 140 160 110 140 160 110 140 160 110 140 160
FRONT TRAVEL 140 140 120-140 150-160 170-180 120-140 150-160 170-180 120-140 150-160 170-180 120-140 150-160 170-180 120-140 150-160 170-180
RIDER HEIGHT  4’10’-5’3″  5′-5’4″  5’2″-5’6″ 5’2″-5’6″ 5’2″-5’6″  5’5″-5’10” 5’5″-5’10”  5’5″-5’10”  5’10”-6’1″  5’10”-6’1″  5’10”-6’1″ 6’0″-6’3″ 6’0″-6’3″  6’0″-6’3″  6’4″-6’8″  6’4″-6’8″  6’4″-6’8″ 
Frame Size:
REACH		  395  415 420 420  420 430  430  430 440  440  440 460 460 460 475  475 475
STACK  610  610 625 630  634 625  630  635 635  640  645 645 650  655 655  660  665
RAD 690-760 720-780 720-790 740-800 740-800 745-805 745-805 745-805 760-820 760-820 760-820 780-860 780-860 780-860 850-920 850-920 850-920
SO  690  695 690 685  705 690  695  710 710  730  750  720 740 760 745  765 785
HA  65.5  65.5 65 64.5  64 65  64.5  64 65  64.5  64 65 64.5 64 65  64.5 64
TT  565  584 575 575  575 594  594  594 610  610  610 630 630 630 650  650 650
BB – 3″tire  340  340 340 350  360 340  350  360 340  350  360 340 350 360 345  355 360
BB – 2.6″tire 330 330 330 340 350 330 340 350 330 340 350 330 340 350 335 345 350
BB – 2.4″tire 320 320 320 330 340 320 330 340 320 330 340 320 330 340 325 335 340
HT  102  102 102 102  102 102  102  102 115  115  115 127 127 127 140  140 140
CS-29  422  422 422 422  422 422 422  422 422  422  422 422 422  422 422  422 422
CS-27.5  412  412 412 412  412 412 412  412 412  412  412 412 412  412 412  412 412
SA  75  75 77 77  76.5 77  77  76.5 77  77  75.5 77  77  75.5 77 75.5 75.5
WB  1130  1140 1180 1190  1200 1200  1210  1220 1215  1225  1235 1235 1245  1255 1255 1265 1275

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