Calfee DIY Frame Materials Set – City Bike


Note: “Due to the change in weather at our headquarters causing a slow in bamboo drying, our lead time on having bamboo available is going to be another 2-3 months or so. Thank you for understanding, we are working diligently to have available stock.” – Calfee Tech
SKU: K1UMAKAL Categories: ,


Calfee DIY bamboo frame Materials for the City bike frame. Choose the size you’d like to build and we’ll supply the appropriate bamboo and head tube for that size.  Also choose whether you want a machined seat tube for running a 35mm clamp-on front derailleur.


  • Dried and dimensioned bamboo appropriate for the size and type of bike selected
  • Pair of dropouts and dropout bolts
  • Head tube for the size and type selected (1 1/8″ or 44mm)
  • Bottom bracket sleeve (English Threaded)
  • Seat tube insert (27.2mm)
  • 2 packages of JB Weld 2 part epoxy
  • packet of Cabosil to thicken JB Weld if needed

Does not include (order separately if needed):

Chart to see which bamboo and head tube lenths come with each size:

Size Type Down Tube Top Tube Seat Tube Chainstay Seatstay 1 1/8″mm Head tube
Extra Small City TTL TTS STM SSL SSL 11.3
Small City TTL TTS STM CSM SSL 11.3
Medium City DTS TTS STM CSM SSL 15
Extra Large City DTL TTL STL CSM SSL 24
Size Wheel Size Nominal Size (actual) Effective Top Tube Length Stand Over Height Seat Tube Angle Head Tube Angle Wheelbase Head Tube Length
Extra Small 26” 13” (37cm) 21.6” (55cm) 26.8” (68.2cm) 72 72 100 4.4” (11.3 cm)
Small 700c 14” (39cm) 21.6” (55cm) 28.3” (72cm) 72 72 99.2 4.4” (11.3 cm)
Medium 700c 16” (43cm) 22.4” (57cm) 29.5” (75cm) 72 72.5 101 5.9” (15 cm)
Large 700c 18” (51cm) 23.2” (59cm) 31.6” (80.5cm) 72 72.5 102.6 7.9” (20 cm)
Extra Large 700c 20” (55cm) 24” (61cm) 33.7” (85.5cm) 72 72.5 104.5 9.5” (24 cm)


Additional information

Weight 176 oz
Dimensions 33 × 6 × 6 in

XSmall, XXL, Small, Medium, Large, XL

35mm clamp-on front derailleur

Yes, No

Bent Chainstays

Yes, No