2023 Trek Bikes X-Caliber 8 Alum HT, 29, 100MM Fork, Base

	XS	S	M	ML	L	XL	XXL
Stack	565mm	574mm	598mm	598mm	608mm	627mm	627mm
Reach	376mm	385mm	418mm	434mm	451mm	466mm	480mm
Stack to Reach Ratio	1.5:1	1.49:1	1.43:1	1.38:1	1.35:1	1.35:1	1.31:1
Seat Tube Length, C-T	343mm	368mm	419mm	444mm	470mm	521mm	559mm
Seat Tube Length, Effective Unknown	735mm	735mm	730mm	730mm	730mm	730mm	730mm
Top Tube Length, Effective/Horizontal Unknown	544mm	555mm	601mm	617mm	637mm	658mm	672mm
Top Tube Slope	26.5deg	24.3deg	20deg	17.1deg	15.1deg	11.9deg	8.3deg
Head Tube Angle	69.3deg	69.3deg	69.5deg	69.5deg	69.5deg	69.5deg	69.5deg
Seat Tube Angle	73.5deg	73.5deg	71.9deg	71.9deg	71.9deg	71.9deg	71.9deg
Head Tube Length	90mm	90mm	90mm	90mm	100mm	120mm	120mm
Bottom Bracket Drop	58mm	48mm	58mm	58mm	58mm	58mm	58mm
Bottom Bracket Height	293.7mm	303.7mm	312.7mm	312.7mm	312.7mm	312.7mm	312.7mm
Chainstay Length	425mm	425mm	438mm	438mm	438mm	438mm	438mm
Chainstay Length Horizontal	421mm	422.3mm	434.1mm	434.1mm	434.1mm	434.1mm	434.1mm
Front-Center	617.7mm	632.5mm	677.3mm	693.3mm	713.2mm	735.2mm	749.1mm
Front-Center Horizontal	615mm	630.7mm	674.9mm	690.9mm	710.9mm	732.9mm	746.9mm
Wheelbase	1036mm	1053mm	1109mm	1125mm	1145mm	1167mm	1181mm
Fork Offset/Rake	42mm	42mm	42mm	42mm	42mm	42mm	42mm
Trail	88mm very high	88mm very high	93.8mm very high	93.8mm very high	93.8mm very high	93.8mm very high	93.8mm very high
Mechanical Trail	82.3mm	82.3mm	87.8mm	87.8mm	87.8mm	87.8mm	87.8mm
Wheel Flop	29.1mm	29.1mm	30.8mm	30.8mm	30.8mm	30.8mm	30.8mm
Standover Height	698mm	724mm	748mm	757mm	757mm	768mm	804mm
Tire to Pedal Spindle	96mm 170 mm cranks	110.9mm 170 mm cranks	136.7mm 170 mm cranks	147.6mm 175 mm cranks	167.5mm 175 mm cranks	189.5mm 175 mm cranks	203.4mm 175 mm cranks
Pedal Spindle to Ground Clearance	123.7mm 170 mm cranks	133.7mm 170 mm cranks	142.7mm 170 mm cranks	137.7mm 175 mm cranks	137.7mm 175 mm cranks	137.7mm 175 mm cranks	137.7mm 175 mm cranks

	XS	S	M	ML	L	XL	XXL
Wheel Size	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	2.35in	2.35in	2.35in	2.35in	2.35in	2.35in	2.35in
Tire Width Max	2.8in	2.8in	2.4in	2.4in	2.4in	2.4in	2.4in
Tire Outer Diameter	703.4mm	703.4mm	741.4mm	741.4mm	741.4mm	741.4mm	741.4mm
Bike Length with Tires	1739.4mm	1756.4mm	1850.4mm	1866.4mm	1886.4mm	1908.4mm	1922.4mm
Crank Length	170mm	170mm	170mm	175mm	175mm	175mm	175mm
Handlebar Width	690mm	720mm	720mm	750mm	750mm	750mm	750mm
Stem Length	60mm	60mm	70mm	70mm	80mm	90mm	90mm
Stem Angle	7deg	7deg	7deg	7deg	7deg	7deg	7deg

Published Sizing Recommendations

Height

137 cm

155 cm

153 cm

167 cm

161 cm

172 cm

166 cm

179 cm

177 cm

188 cm

186 cm

196 cm

195 cm

203 cm

Very Upright

Somewhat Upright

Average

Somewhat Aggressive

Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Learn more about the Upright/Aggressive Scale

Category Trend

Hardtail Trail MTB

Source:https://www.trekbikes.com/us/en_US/bikes/mountain-bikes/cross-country-mountain-bikes/x-caliber/x-caliber-8/p/35069/

Suggest Bike Edit

2023 Trek Bikes X-Caliber 8 Alum HT, 29, 100MM Fork, Base

Geometry

Alum HT, 29, 100MM Fork, Base Build

Published Sizing Recommendations

Stack and Reach vs. Category Trend