Tandem Bike Geometry

Calfee Tandem Road Frame Geometry

Captain Stoker
Sizes Size Stand- over Ht. Seat Angle Top Tube Front Center Head Tube Length Size Stand- over Ht. Seat Angle Top Tube
Small/Small 50 77 74 53 56.5* 11.5 46 71 74 72
Medium/Small 54 79 74 55 58.5* 14 46 75 74 72
Large/Small 58 82.5 73 57 59.5 18 46 75.3 74 72
Large/Medium 58 83.5 73 57 59.5 18 54 79 73 72
XLarge/Small 62 83 73 60 61.5 20 48 75.5 73 72
XL/Medium 62 83.5 73 60 61.5 20 54 79 73 72

*These sizes may have toe overlap, depending on shoe size and crank arm length.
When comparing our frames with your current frame, use the stand over height and top tube length for comparison.

Single Bike Geometry

Manta Pro Geometry

Size* top tube length seat angle chainstay length stand over height b.b. drop head tube angle head tube length Stack Reach wheel base
50 52.5 74 41.5 75.4 7 72.5 11.0 52.3 37.4 97.3
52 53.5 74 41.5 76.7 7 73 12.0 53.4 38.1 97.9
54 54.8 73.5 41.5 77.2 7 73 14 55.3 38.2 98.8
56 56 73 41.5 81.1 7 73.5 16.0 58.4 38.2 99.3
58 57 73 41.5 81.5 7 74.0 18.0 59.5 38.9 99.3
60 58.3 72.5 41.5 82.0 7 74.0 20.0 61.5 39.1 99.8
62 60 72.5 41.5 82.8 7 73.5 21.0 62.2 40.5 102.3
64 61 72 41.5 86.4 7 73 23.0 63.9 40.3 103.3
66 61.5 72 41.5 86.7 7 73 24.0 64.9 40.5 103.8
68 63 72 41.5 87.7 7 72.5 25.0 65.8 41.7 105.3

Dragonfly, Tetra, Luna, Pro 44 Geometry (44mm head tube)

Size* top tube length seat angle chainstay length stand over height b.b. drop head tube angle head tube length Stack Reach wheel base
48 51.5 74.5 41.5 74.8 7 72 10 51.0 37.2 97.2
50 52.3 74 41.5 76.2 7 72.5 11.3 52.4 37.2 97.1
52 53.5 74 41.5 78.1 7 73 12.8 54.0 39.2 97.9
54 54.8 73.5 41.5 78.8 7 73 14 55.2 38.4 98.5
56 56 73 41.5 80.1 7 73.5 16.0 57.3 38.5 98.8
58 57 73 41.5 81.6 7 73.5 18.0 59.2 39.0 99.8
60 58.3 72.5 41.5 84.2 7 73.5 20.0 61.1 39.1 100.5
62 60 72.5 41.5 85.3 7 73.5 22.0 63.0 40.3 102.2
64 61 72 41.5 86.8 7 73 23.0 63.8 40.5 103.1
66 61.5 72 41.5 87.7 7 73 24.0 64.7 40.5 103.8
68 63 72 41.5 88.2 7 73 25.0 65.7 41.8 103.8

*Frame size is measured from center of bottom bracket to bottom of binder.
Check standover height(ground to top of top tube) to be sure of proper fit.
Allow 1 to 2cm clearance to crotch. Click here for frame measurement terms.

*46 cm frames are not available.  Please refer to the traditional model type for options.

Dragonfly, Tetra, Luna, Bamboo Pro Geometry (Classic Models)

Size* top tube length seat tube angle set back chainstay length stand over height b.b. drop head tube angle head tube length Stack Reach wheel base
46 ** 50 75 11.9 39 71.5 4 72 9.1 N/A N/A 93.4
48 51.5 74.5 12.7 41.5 74.0 7 72 9.1 50.5 37.3 97.0
50 52.5 74.5 13.4 41.5 76.2 7 72.5 10.0 51.5 38.2 97.1
52 53 74 14.3 41.5 77.4 7 73 11.3 52.7 37.8 97.2
54 54.8 73.5 15.3 41.5 79 7 73 12.8 54.2 38.7 98.0
56 56 73 16.4 41.5 81.3 7 73.5 15.0 56.3 38.8 98.8
58 57 73 17.0 41.5 82.3 7 74 16.0 57.2 39.5 99.4
60 58.3 72.5 18.0 41.5 84.4 7 74 18.0 59.1 39.7 100.0
62 60 72.25 19.0 41.5 85.8 7 74 20.0 61.1 40.7 101.0
64 61 72 19.8 41.5 87.3 7 74 22.0 63.0 40.7 102.0
66 63.3 71.5 20.8 41.5 88.0 7 74 24.0 64.9 42.2 104.3

*Frame size is measured from center of bottom bracket to bottom of binder.
Check standover height(ground to top of top tube) to be sure of proper fit.
Allow 1 to 2cm clearance to crotch. Click here for frame measurement terms.

**46 cm frames use 650 c wheels

Manta, Dragonfly, Tetra, Luna, Bamboo Adventure/CX Geometry

Size* top tube length seat angle chainstay length stand over height b.b. drop head tube angle head tube length Stack Reach wheel base
48 51.5 74.5 43.0 75.6 7 71.5 10.0 53.4 36.5 99.9
50 52.5 74.5 43.0 76.3 7 72.0 10.0 53.6 37.5 100.5
52 53.1 74 43.0 78.3 7 72.0 12.0 55.5 37.0 100.6
54 55 73.5 43.0 79.2 7 72.5 13.0 56.6 38.1 101.6
56 57.2 73 43.0 81.2 7 72.5 15.0 58.5 38.7 102.9
58 57.7 73 43.0 82.1 7 72.5 16.0 59.5 39.5 103.9
60 58.6 72.5 43.0 85.2 7 72.5 18.0 61.4 39.2 104.3
62 59.3 72.5 43.0 85.6 7 72.5 20.0 63.3 39.1 104.7
64 61.3 72 43.0 87.6 7 72.5 22.0 65.2 40.2 106.4
66 63.6 71.5 43.0 88.9 7 73 24.0 67.3 41.3 107.6

*Frame size is measured from center of bottom bracket to bottom of binder.
Check standover height(ground to top of top tube) to be sure of proper fit.
Allow 1 to 2cm clearance to crotch. Click here for frame measurement terms.

*46 cm frames are not available.

Bamboo Mountain Geometry

Size Wheel size Nominal
Size
Effective top tube length Stand over height Seat tube angle Head tube angle Wheelbase Head tube length
Extra Small 26” 13” (38.6cm)* 20” (50.7cm) 28.4” (72cm) 74 70 99 3.58” (9 cm)
Small 26” 14″ (40cm)* 21.25” (54cm) 29” (74cm) 73.5 71 101.7 3.58” (9 cm)
Small 27.5 27.5/650b” 14” (40cm)* 21.25” (54cm) 30” (76.5cm) 73.5 71 105.3 3.58” (9 cm)
Medium 26” 16” (44cm)* 22” (56cm) 29.5” (75cm) 73 71 104 3.93” (10 cm)
Medium 27.5 27.5/650b” 16” (42.6cm)* 22” (56cm) 30.5” (77.5cm) 73 71 107 3.93” (10 cm)
Medium 29 29” 16” (45cm)* 22” (56cm) 31.5” (80cm) 73 71 110 3.58” (9 cm)
Large 26” 18” (51cm)* 22.7” (57.7cm) 31” (78.7cm) 73 71 105.5 5” (12.8 cm)
Large 27.5 27.5/650b” 18” (50.6cm)* 22.7” (57.7cm) 32.5” (82.cm) 73 71 108.8 5” (12.8 cm)
Large 29 29” 18” (50cm)* 22.7” (57.7cm) 32.5” (82.6cm) 73 71 118.8 4.45” (11.3 cm)
Extra Large 26” 20” (56cm)* 24.4” (62cm) 32.5” (82.6cm) 72.5 71.5 108.8 5.91” (15 cm)
Extra Large 27.5 27.5/650b” 20” (54.6cm)* 24.4” (62cm) 33.5” (85cm) 72.5 71.5 112 5.91” (15 cm)
Extra Large 29 29” 20” (54cm)* 24.4” (62cm) 33.5” (85cm) 72.5 71.5 115 5” (12.8 cm)