Behemoth Frame

The Lenz Sport Behemoth is the ultimate mountain bike made for all types of trail riding. This bike rips on downhills, crushes the steepest climbs, dominates in technical terrain, and flows fast at the bike park. It has incredible traction for climbing steep technical and loose 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. The super short chainstay makes the bike easy to manual over rocks and roots and maneuver in technical sections. With our Trail Optimized geometry you will love the handling, climbing, cornering, and descending characteristics and you can say goodbye to annoying pedal strikes. Built for technical terrain, you will be glad to be able to keep pedaling through the most chunky trails without clipping your pedals constantly. We don’t like missing our lines due to pedal strikes, and you shouldn’t either. With our progressive spring curve rear suspension you get a super supple suspension that eats up the small bumps and has the deep end support you want to land drops with ultimate control and stability. In a nutshell, the Behemoth will make you faster with more confidence and a better technical rider than you ever thought you could be. This bike is designed with extra tire clearance to give the rider a wide range of tire size options from 2.4″ tires all the way up to 3 inch 29 plus tires or 27.5 plus. The Behemoth has 140mm of rear travel and works great with a 150mm or 160mm travel front fork. The super short chainstay is designed for maneuverability, easy manuals, and to be specific to 1x component groups. For those who like a mixed wheel set up, the Behemoth can be rigged with a 27.5 inch rear wheel and 29 inch front wheel. All Lenz mountain bike frames are 100% handmade in Colorado.
  • 29er or 27.5 inch wheels
  • 29 Plus or 27.5 plus capable
  • 2.4″ to 3.0″ tire size range
  • Trail Optimized Geometry
  • Handmade Lightweight Aluminum frame
  • 140mm rear travel
  • 150mm or 160mm fork travel options
  • Rear Shock Spec:210x55mm0 with 25.4x8mm mounting hardware
  • 12x148mm rear through axle. QR thru axle included.
  • 30.9mm seatpost diameter
  • Internal routing for shift, brake, and dropper post cables
  • 44/49 Tapered Headtube
  • 73mm BSA threaded bottom bracket shell
  • Click here for color options

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

Description

The Lenz Sport Behemoth is the ultimate mountain bike made for all types of trail riding. This bike rips on downhills, crushes the steepest climbs, dominates in technical terrain, and flows fast at the bike park. It has incredible traction for climbing steep technical and loose 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. The super short chainstay makes the bike easy to manual over rocks and roots and maneuver in technical sections. With our Trail Optimized geometry you will love the handling, climbing, cornering, and descending characteristics and you can say goodbye to annoying pedal strikes. Built for technical terrain, you will be glad to be able to keep pedaling through the most chunky trails without clipping your pedals constantly. We don’t like missing our lines due to pedal strikes, and you shouldn’t either. With our progressive spring curve rear suspension you get a super supple suspension that eats up the small bumps and has the deep end support you want to land drops with ultimate control and stability. In a nutshell, the Behemoth will make you faster with more confidence and a better technical rider than you ever thought you could be. This bike is designed with extra tire clearance to give the rider a wide range of tire size options from 2.4″ tires all the way up to 3 inch 29 plus tires or 27.5 plus. The Behemoth has 140mm of rear travel and works great with a 150mm or 160mm travel front fork. The super short chainstay is designed for maneuverability, easy manuals, and to be specific to 1x component groups. For those who like a mixed wheel set up, the Behemoth can be rigged with a 27.5 inch rear wheel and 29 inch front wheel. All Lenz mountain bike frames are 100% handmade in Colorado.

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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.
MODELSeshSeshMammothBehemothLunchboxMammoth Behemoth Lunchbox MammothBehemothLunchoxMammothBehemoth LunchboxMammoth BehemothLunchbox
REAR TRAVEL130130110140160110140160110140160110140160110140160
FRONT TRAVEL140140120-140150-160170-180120-140150-160170-180120-140150-160170-180120-140150-160170-180120-140150-160170-180
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 415420 420 420 430 430 430 440 440 440 460460 460 475 475 475
STACK 610 610625 630 634625 630 635635 640 645 645650 655655 660 665
RAD690-760720-780720-790740-800740-800745-805745-805745-805760-820760-820760-820780-860780-860780-860850-920850-920850-920
SO 690 695690 685 705 690 695 710710 730 750 720740 760745 765 785
HA 65.5 65.565 64.5 64 65 64.5 6465 64.5 64 6564.5 6465 64.5 64
TT 565 584575 575 575 594 594 594610 610 610 630630 630650 650 650
BB – 3″tire 340 340340 350 360 340 350 360340 350 360 340350 360345 355 360
BB – 2.6″tire330330330340350330340350330340350330340350335345350
BB – 2.4″tire320320320330340320330340320330340320330340325335340
HT 102 102102 102 102 102 102 102115 115 115 127127 127140 140 140
CS-29 422 422422 422 422 422 422 422422 422 422 422422 422422 422 422
CS-27.5 412 412412 412 412 412 412 412412 412 412 412 412 412412 412 412
SA 75 7577 77 76.5 77 77 76.577 77 75.5 77 77 75.577 75.5 75.5
WB 1130 11401180 1190 1200 1200 1210 12201215 1225 1235 12351245 12551255 1265 1275

$2,650.00

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