Compare: 2023 TanTan Cycling (Seraph) TT-X34 Base L / 56 vs 2026 Mondince FM126 Base 56

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of TanTan Cycling (Seraph) TT-X34

Average stack and reach vs trend of performance road bikes

Stack	564mm	565mm +1mm
Reach	394mm	395mm +1mm
Stack to Reach Ratio	1.43:1	1.43:1
Seat Tube Length, C-T	525mm	494mm -31mm
Top Tube Length, Effective/Horizontal Center	—	562mm
Top Tube Length, Effective/Horizontal HT Top	559mm	—
Top Tube Slope	6.3deg	9.7deg +3.4deg
Head Tube Angle	73.5deg	73.5deg +0deg
Seat Tube Angle	73.7deg	73.5deg -0.2deg
Head Tube Length	151mm	156mm +5mm
Bottom Bracket Drop	72mm	72mm +0mm
Bottom Bracket Height	269mm	271mm +2mm
Chainstay Length	410mm	410mm +0mm
Chainstay Length Horizontal	403.6mm	403.6mm +0mm
Front-Center	591mm	592mm +1mm
Front-Center Horizontal	586.6mm	590.4mm +3.8mm
Wheelbase	990.2mm	994mm +3.8mm
Fork Offset/Rake	45mm	47mm +2mm
Fork Length (On-Axis)	—	370mm
Trail	54.1mm mid/neutral	52.6mm -1.5mm mid/neutral
Mechanical Trail	51.9mm	50.4mm -1.5mm
Wheel Flop	14.7mm	14.3mm -0.4mm
Tire to Pedal Spindle	80mm 170 mm cranks	79mm -1mm 170 mm cranks
Pedal Spindle to Ground Clearance	99mm 170 mm cranks	101mm +2mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	30mm	32mm +2mm
Tire Outer Diameter	682mm	686mm +4mm
Bike Length with Tires	1672.2mm	1680mm +7.8mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Carbon/Composite	Carbon/Composite
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Disc	Disc

Actions	Collection I've Ridden	Collection I've Ridden
Source	http://tantancycling.com/index.php?_m=mod_product&_a=view&p_id=1043	https://mondincecycle.com/product/2026-one-piece-monocoque-eps-t1100-carbon-fiber-aero-road-bike-frame-fm126
Brand	TanTan Cycling (Seraph)	Mondince
Bike	2023 TT-X34 Base	2026 FM126 Base
Size	L / 56	56
Category	Performance Road	Performance Road