The 2025 Lauf Elja is notable as the brand’s first production mountain bike, and it arrives with a distinctly Lauf approach rather than a conventional copy of existing short-travel XC platforms. The shared carbon Elja frame underpins both the XC and Trail variants, using Lauf’s LSP true single-pivot rear suspension with 120 mm of rear travel, Boost 148 rear spacing, and unusually generous tire clearance for 29 x 2.8-inch tires, with room up to 3.0 inches. Frame details such as the swingarm braced behind the seat tube, the flex-arms at the shock drive, and the low horizontal shock layout show that the bike is built around packaging, stiffness management, and simplicity rather than chasing category trends for their own sake.
What makes the Elja distinctive in the market is how it blends modern downcountry geometry with a deliberately simplified frame concept. The XC and Trail versions share the same chassis but are separated by fork choice and front-end geometry: the XC uses a 120 mm SID fork and a 66-degree head angle, while the Trail moves to a 130 mm Pike and a 65.6-degree head angle. Lauf also commits to a wireless-only shifting design, eliminating shift-housing tunnels in the frame, and uses a threaded BSA/DUB bottom bracket not just at the crankset but also at the main pivot. Taken together, the Elja sits in the space between aggressive XC and light trail bikes, aimed at riders who want modern capability and large-tire versatility without the complexity of a more elaborate suspension layout.
| Stack | 605mm |
| Reach | 450mm |
| Headtube length | 106mm |
| Standover height | 747mm |
| Seat tube length | 443mm |
In XC form, the Elja’s geometry is firmly modern for a short-travel 29er. A 66-degree head tube angle is substantially slacker than traditional XC race bikes, pointing to more confidence on steeper descents and at higher speeds. Reach figures of 420 mm in S, 450 mm in M, 480 mm in L, and 507 mm in XL are paired with relatively tall stacks from 595 mm to 625 mm, giving the bike a roomy, centered riding position rather than an aggressively low front end. The seat tube angle steepens in the smaller sizes, from 75.7 degrees in XL to 77.5 degrees in S, which helps keep rider weight forward for climbing and maintains fit consistency across the size range.
The rest of the numbers support stable, predictable handling. Chainstays are a consistent 435 mm across all sizes, and wheelbase grows from 1149 mm in S to 1249 mm in XL, so the bike should feel planted without becoming unusually long for its travel category. A 40 mm bottom bracket drop keeps the rider reasonably low between the wheels for cornering stability while preserving pedal clearance for technical terrain. Overall, the geometry suggests an XC bike biased toward control and traction over razor-sharp race-bike twitchiness, especially when combined with the platform’s ability to run very high-volume tires.
Frameset
Frame
Lauf IRM* Elja carbon frame, 29x2.8/3.0" tire clearance**, Boost148, LSP, 120mm travel
Fork
RockShox Sid Ultimate Flight Attendant, 29x2.6" claimed tire clearance, Boost110, 120mm travel
Rear shock
RockShox SIDLuxe Ultimate Flight Attendant, 190x45mm
Weight
~12.09 kg / 26.46 lbs. (avg. for size medium, with tire sealant)
Groupset
Shift levers
SRAM AXS PODS, wireless shifting
Rear derailleur
SRAM Eagle Transmission X0, wireless shifting
Cassette
SRAM XS-1275 Eagle Transmission Cassette, 12 speed, 10-52t
Chain
SRAM Eagle Transmission X0, flat-top, 118 links
Crankset
SRAM X0 Eagle AXS Transmission Power Meter Crankset 32t, 170mm, 55CL
Bottom bracket
SRAM DUB BSA73
Front brake
SRAM Level Bronze Stealth 4-Piston
Rear brake
SRAM Level Bronze Stealth 4-Piston
Front rotor
SRAM Centerline Ø180mm, 6-Bolt
Rear rotor
SRAM Centerline Ø180mm, 6-Bolt
Wheelset
Front wheel
Zipp 1Zero HiTop S, 29", carbon, 6-bolt, XD freehub, tubeless ready
Rear wheel
Zipp 1Zero HiTop S, 29", carbon, 6-bolt, XD freehub, tubeless ready
Front tire
Goodyear Peak 2.6" Tubeless Complete 120tpi
Rear tire
Goodyear Peak 2.6" Tubeless Complete 120tpi
Cockpit
Stem
FSA Comet Ω35 (S: 35mm, M-XL: 50mm)
Handlebars
Lauf Mtn Bar, 780mm wide, Ø35mm
Saddle
Fizik Vento Argo X5 140mm, OEM version
Seatpost
RockShox Reverb AXS, Ø31.6mm
Grips
Lauf bolt-on grips
The available Elja builds listed here are both premium XC models, with the Race Flight Attendant at $7,590 and the Ultimate Flight Attendant at $8,990. Both are positioned around SRAM’s Flight Attendant ecosystem, which immediately places them at the high end of the category and signals that Lauf is focusing on flagship-level electronic suspension and drivetrain integration rather than offering a broad spread of entry and midrange builds.
With only these two builds provided, the main distinction is price tier rather than a fully detailed component breakdown. The Race Flight Attendant serves as the lower-priced entry into the Elja XC platform, while the Ultimate Flight Attendant is the top-spec option at a $1,400 premium. Given the shared carbon frame and the brand’s emphasis on the Elja chassis itself, the build range appears intentionally tight and premium, aimed at riders shopping for a high-end, modern XC bike rather than value-oriented complete builds.
Race Flight Attendant
$7,590
Ultimate Flight Attendant
$8,990