Siena Disc Road Bike - 40c Tires

The Siena Disc brings an unprecedented level of versatility and value to our Adventure line.  Designed as an all-in-one, go anywhere bike, the Siena is perfect for the value riders who needs one bike for everything. 28 spoke wheels can handle extra weight and tough terrain, and Avid BB5 disc brakes offer great stopping power in adverse weather and terrain conditions.  The Shimano Tourney drivetrain offers a wide variety of gearing options, so you can handle whatever the trail throws at you.




A Tommaso 6061 SLA Aluminum compact frame and SST Steel fork make for a strong, reliable, and lightweight ride.  The frame is also rack ready for all your touring and commuting needs.



The Shimano Tourney drivetrain provides riders with 21 quick, reliable speeds.  A 30/39/50T Tourney triple crankset and a 12-28T Tourney cassette offer a wide range of gearing options, perfect for wherever you choose to take this versatile ride.



Heavy duty Tommaso Corsa TC-20D wheels are our toughest wheels, and specifically designed to handle rough terrain, dirt, and gravel.  The 28 spoke rims roll great and can handle the extra weight of touring gear with ease.




Tommaso 6061 SLA Lightweight Aluminum Compact Road Frame

Tommaso SST Steel w/ 6061 SLA Aluminum Steerer Tube Fork

Shimano Tourney Derailleurs

Shimano Tourney Shifters

Shimano Tourney 30/39/50T Triple Crankset

7 speed Shimano Tourney 12x28T cassette

Tommaso Corsa TC-20D Wheelset

Avid BB5 Disc Brakes

CST Tirent All-Terrain 700x40c

Tommaso Ultralight Alloy Compact Flat Top Handlebar







Frame Tommaso 6061 SLA Aluminum Compact Road Frame
Fork Tommaso SST Steel with Aluminum Steer Tube
Sizes XS, S, M, L, XL
Headset 1-1/8" Threadless Integrated


Shifters Shimano Tourney
Front Derailleur Shimano Tourney (3-spd)
Rear Derailleur Shimano Tourney (7-spd)
Cassette Shimano Tourney 12-28t - 7spd
Speeds 3x7 (21 Total Speeds)
Crankset Shimano Tourney Triple 30/39/50T
Crank Arm Length 165mm (XS) / 170mm (S, M Frames) / 175mm (L, XL Frames)
Chain KMC Z-51 (7spd Chain)
Bottom Bracket Shimano BB - UN26


Brakes Avid BB5 Disc Calipers
Brake Levers Shimano Tourney


Wheelset Tommaso Corsa TC-20D - 28 Spokes
Tires CST Tirent All-Terrain 700x40c
Tubes 700 x 40c


Handlebar Tommaso Ultralight Alloy Compact Flat Top Bar
Handlebar Width 400mm (XS Frame) / 420mm (S, M, L Frames) / 440mm (XL Frame)
Handlebar Drop 125mm
Handlebar Tape Tommaso Cork Tape Black
Stem: Tommaso Ultralight Sport Series Aluminum
Stem Length 75mm (XS Frame) / 90mm (S Frame) / 105mm (M Frame) / 120mm (L, XL Frames)
Saddle Tommaso Saddle
Seatpost Tommaso TRS Ultralight Race Series Aluminum 27.2mm
Pedals Composite Flat






  Frame Size XS S M L XL
  Recommended Height 5'2" - 5'6" 5'6" - 5'8" 5'8" - 5'11" 5'11" - 6'2" 6'2" - 6'5"
A Seat Tube (mm) 450 480 510 540 570
B Top Tube (mm) 506.3 525.2 539.5 555.7 571.6
C Top Tube (mm) - Effective 525 545 560 575 590
H Chainstay (mm) 410 410 410 410 410
I Wheelbase (mm) 973.9 989.3 999.4 1009.7 1024.9
G Fork Offset (mm) 45 45 45 45 45
E Head Tube Angle (deg) 72 72 72 72.5 72.5
D Seat Tube Angle (deg) 74 73.5 73 73 73
F Head Tube (mm) 135 150 170 190 210
  Standover Height (mm) 725 750 770 795 820
  Stem (mm) 70 90 105 120 120
  Crank (mm) 165 170 170 175 175


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