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Trek Session Al Frameset

Trek Session Al Frameset
  • Color: Deep Dark Blue to Alpine Blue Fade
  • Color | Size | Wheel Size: Deep Dark Blue to Alpine Blue Fade | R3 | 29-inch
Color: Deep Dark Blue to Alpine Blue Fade
Size: Select size
Wheel Size: 29-inch
Please select options Unavailable
This item can be picked up curbside or delivered within the city!


Session AL frameset gives you an awesome foundation for building up your ideal downhill machine. The new high-pivot suspension design keeps you nimble, planted, and blazing fast on even the most punishing runs, and burly alloy construction rolls with the punches on gnarly and technical trails.

- New suspension layout with a high pivot and idler pulley increases traction, carries more speed, and reduces pedal kickback for more stability
- Virtually zero pedal kickback means you’ll stay confidently planted and in control during descents—especially when landing jumps or drops
- The high pivot design delivers a more efficient rearward axle path so you’ll carry more speed and your wheel won’t get hung up on obstacles
- Adjust your suspension progression by flipping the lower shock mount chip—20% for plush park rides, 25% for racing efficiency
- Our new DH sizing system is based on reach, not rider height, which is the most important factor in a great downhill bike fit

Geometry Chart:
Frame size letterR1R1R2R2R3R3
Geometry positionHigh LowHighLowHighLow
Wheel size29" 29"29"29"29"29"
A — Seat tube42.5 42.542.542.542.542.5
B — Seat tube angle61.6° 61.0°61.6°61.0°61.6°61.0°
Effective seat tube angle77.1° 76.5°77.1°76.5°77.1°76.5°
C — Head tube length11.7 11.711.711.711.711.7
D — Head angle63.6° 63.0°63.6°63.0°63.6°63.0°
E — Effective top tube58.6 58.761.761.865.265.3
F — Bottom bracket height35.9 3535.93535.935
G — Bottom bracket drop1.2
H — Chainstay length43.5 43.944.144.544.845.2
I — Offset4.6
J — Trail13.1 13.613.113.613.213.6
K — Wheelbase124.3 124.6127.4127.7130.9131.2
L — Standover75.5 74.775.975.175.774.9
M — Frame reach44.7 4447.246.549.949.3
N — Frame stack63.4 63.963.463.963.463.9
SizeRider HeightInseam
R1 5'3" - 5'9" 30" - 32"
R2 5'9" - 6'2" 32" - 35"
R3 6'1" - 6'5" 34" - 36"


Frame Alpha Platinum Aluminum, high main pivot, idler pulley, integrated frame protection, internal or external routing, magnesium rocker link, Mino Link, ISCG 05 2-bolt mount, Active Braking Pivot, 157x12mm thru axle, 200mm travel
Rear Shock Marzocchi Bomber, 450lb spring, 250mm x 72.5mm

* Subject to change without notice.

Part Numbers

Option UPC MPN
Deep Dark Blue to Alpine Blue Fade / R1 / 29-inch 745889027662 5288398
Deep Dark Blue to Alpine Blue Fade / R2 / 29-inch 745889027587 5288399
Deep Dark Blue to Alpine Blue Fade / R3 / 29-inch 745889027563 5288400