Insight STI-8

Choosing to live car-free sounds great, but finding the bike that’s going to give you what you need to make it happen can be very difficult, until now. The Insight STI-8 has a 6061-T6 aluminum alloy frame for worry-free durability, and its seat stays are custom designed for comfort. The Integrated Aero Alloy straight blade fork delivers crisp and quick handling, and the frame and fork eyelets let you easily mount a rack and fenders. Top it off with easy rolling 700c wheels and a Shimano Nexus 8-speed internally geared hub drivetrain, and you’ll have no problem deciding this bike is right for you.

Upgrades over Insight STI-1

  • Shimano 8-speed twister shifter
  • Shimano 8-speed internal geared hub
  • Kenda K-shield puncture resistant tires


  • Hand built 6061-T6 aluminum alloy frame is durable and comfortably compliant
  • Integrated Aero Alloy straight blade fork delivers quick, confident handling
  • Frame and fork eyelets let you mount rack and fenders
  • 8-speed drivetrain is simple and reliable

Bike Specs

Sizes NA  SM(16")  MD(18")  LG(20")  XL(22") 
Frame Insight 6061-T6 Butted Aluminum Performance Hybrid w/ Formed / Hooded Top Tube, Integrated Headtube, Vertical Compliance Stays, (VCS)
Fork Insight integrated Aero Alloy straight blade
Rear Shock
Cranks Alloy single chainring w/ alloy chainguard 38t
Bottom Bracket Sealed Cartridge
F. Derailleur
R. Derailleur
Shifter Shimano SL8S-20 light action, 8 spd, twist
Brake Levers Tektro RS w/reach adj.
Brakes Alloy Linear
Cassette Shimano 18t sproket for internal gear hub
Rims 32h Equation R23 Doublewall
Tires Kenda Kwick Trax w/ puncture resistant K-shield 700x32c
Pedals Wellgo Alloy body / cage, toe clip compatible
Handlebar DB 31.8mm low rise Alloy
Stem DB 3D Forged 7° 31.8mm
Seatpost Alloy Micro Adjust 27.2mm
Seat DB Performance Hybrid w/ Gel
Headset Integrated "Cane Creek" Size Drop-in ACB 1 1/8"
Colors Matte Dark Grey
Chain KMC-Z51
Hubset (F) 32h Alloy QR (R)
Spokes Black 14g Stainless Steel
Grips Diamondback Dual Density Comfort Grip
Extras Owner’s manual, Chainstay Protector, Clear Coat, H20 bottle mounts
Note Specifications Subject to Change


Size NA SM(16") MD(18") LG(20") XL(22")
Seat Tube Length ** " " " " "
Standover Height " " " " "
Top Tube Length * " " " " "
Head Tube Length mm mm mm mm mm
Head Angle ° ° ° ° °
Seat Angle ° ° ° ° °
Wheel Base mm mm mm mm mm
Chain Stay Length mm mm mm mm mm
Fork Offset mm mm mm mm mm
Stem Length mm mm mm mm mm
Handlebar Width mm mm mm mm mm
Crank Length mm mm mm mm mm
Seat Post Length mm mm mm mm mm
* Measured Horizontally ** Measured from Center

Fit Calculator

Bike Type


Measurement Units


Based on your input...

Your Bike size is:

Site Map Diamondback For Life