
Cane Creek Thudbuster ST Seatpost Black, 30.9mm
30.9mm
Velopedia Bicycle Archive
Original specifications: 29.1 kg (64 lb, 2.5 oz) published weight · geometry for 3 published sizes.
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At a glance
| Frame Construction | E5 Aluminum, bottom bracket motor mount, fully integrated &lockable downtube battery, internal cable routing, lock and front rack mount, sliding dropout |
|---|---|
| Frame Material | Aluminum |
| Fork | Rockshox Recon Silver RL, 80mm travel, Motion-Control |
| Rear Derailleur | Enviolo Automatiq |
|---|---|
| Crankset | Praxis, Brose Isis, 165mm, Bcd 104mm |
| Cassette | Gates Carbon Drive Sprocket, 22T |
| Chain | Gates Carbon Drive CDX 122t belt, black |
| Brakes | (F) Shimano CUES BL-U8000. 4 Pistons / (R) Shimano CUES BL-U8000. 4 Pistons |
|---|
| Handlebar | Specialized Como handlebar/stem combo |
|---|---|
| Stem | Specialized integrated stem |
| Saddle | Body Geometry Comfort Gel, 200mm W/ Handle |
| Seatpost | Suspended Cane Creek, Thudbuster St, 30.9 mm |
| Hubs | (F) Specialized alloy front hub disc, sealed cardridge bearings, 6-bolt, 15x110mm thru-axle, 32h / (R) REAR HUB, CVP, ENVIOLO CHINA, CVP-TR-32-DC-OE-2, TREKKING, 32 SPOKE, DISC BRAKE - 40T SPLINE |
|---|---|
| Rims | 29 front, 27.5 rear, 30mm inner width, 32h |
| Spokes | DT Swiss Elemental |
| Front Tire | Hemisphere Flat Protection Reflect, 650b X 2.3 |
| Rear Tire | Hemisphere Flat Protection Reflect, 650b X 2.3 |
| Motor | Motor, Brose, gen2, torque 90nm, 28mph |
|---|---|
| Battery | Specialized integrated battery, state of charge display, 710Wh, UL |
| Display/Remote | Display with handlebar remote, Bluetooth® connectivity, customizable display pages |
| Charger | Custom charger, 42V4A w/ Rosenberger plug, 100-240V |
Frame measurements by size.
Published frame view
Select an available measurement to locate it on the frame.
| Measurement | L | M | S |
|---|---|---|---|
| Seat tube | 450 mm | 450 mm | 460 mm |
| Head tube | 150 mm | 170 mm | 180 mm |
| Head-tube angle | 67° | 67.5° | 68° |
| Chainstay / rear center | 470.4 mm | 470.4 mm | 470.4 mm |
| Wheelbase | 1194 mm | 1221 mm | 1241 mm |
| Bottom-bracket drop | 80 mm | 80 mm | 80 mm |
| Bottom-bracket height | 275 mm | 275 mm | 275 mm |
| Reach | 441 mm | 465 mm | 486 mm |
| Stack | 650 mm | 671 mm | 682 mm |
| Standover height | 355 mm | 355 mm | 355 mm |
| Fork offset / rake | 44 mm | 44 mm | 44 mm |
| Front center | 735 mm | 762 mm | 781 mm |
| Trail | 103 mm | 99 mm | 96 mm |
| Fork length / axle-to-crown | 487 mm | 487 mm | 487 mm |
| Crank length | 165 mm | 165 mm | 165 mm |
| Handlebar width | 680 mm | 680 mm | 680 mm |
Measurements may vary by configuration, wheel size, or frame setting where noted in the published chart.
Parts & serviceability

30.9mm
Based on the original build. Confirm the model, size and fit before ordering; installed parts may differ. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases.
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Archived: 2027 Specialized Turbo Como 5.0 IGH · Electric-assist · Published sizes: S, M, L
Archived: Frame: E5 Aluminum, bottom bracket motor mount, fully integrated &lockable downtube battery, internal cable routing, lock and front rack mount, sliding dropout · Fork: Rockshox Recon Silver RL, 80mm travel, Motion-Control
Archived: Fork: Rockshox Recon Silver RL, 80mm travel, Motion-Control
Archived: Rear derailleur: Enviolo Automatiq · Crankset: Praxis, Brose Isis, 165mm, Bcd 104mm · Cassette: Gates Carbon Drive Sprocket, 22T · Chain: Gates Carbon Drive CDX 122t belt, black
Archived: Brakes: (F) Shimano CUES BL-U8000. 4 Pistons / (R) Shimano CUES BL-U8000. 4 Pistons
Archived: Rims: 29 front, 27.5 rear, 30mm inner width, 32h · Hubs: (F) Specialized alloy front hub disc, sealed cardridge bearings, 6-bolt, 15x110mm thru-axle, 32h / (R) REAR HUB, CVP, ENVIOLO CHINA, CVP-TR-32-DC-OE-2, TREKKING, 32 SPOKE, DISC BRAKE - 40T SPLINE · Front tire: Hemisphere Flat Protection Reflect, 650b X 2.3 · Rear tire: Hemisphere Flat Protection Reflect, 650b X 2.3
Archived: Handlebar: Specialized Como handlebar/stem combo · Stem: Specialized integrated stem · Seatpost: Suspended Cane Creek, Thudbuster St, 30.9 mm · Saddle: Body Geometry Comfort Gel, 200mm W/ Handle
Archived: Motor: Motor, Brose, gen2, torque 90nm, 28mph · Battery: Specialized integrated battery, state of charge display, 710Wh, UL · Display: Display with handlebar remote, Bluetooth® connectivity, customizable display pages · Charger: Custom charger, 42V4A w/ Rosenberger plug, 100-240V
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.