Specialized ROCKHOPPER PRO DISC 2004 VS Trek 820 2003 specs comparison

Specialized Rockhopper Pro Disc

General Infos

Model	Rockhopper Pro Disc
Manufacturer	Specialized
Year of production	2004
Current price	Check price Here ==>
Color choice	-Red
Sizes	- 15 (inches) - 17 (inches) - 19 (inches) - 21 (inches)
Sizes	- 15 (inches) - 17 (inches) - 19 (inches) - 21 (inches)

Wheels And Breaking System

Bike front tire	26 X 2.00 (inches) Specialized Roll-X
Bike rear tire	Not Available
Bike wheel size	26 (inches) Wheels
Brakeset type	Shimano BR-420 Levers Shimano BR-M515 Mechanical Disc Brakes
Hubs for disc brakes	Rear: Shimano HB-M475 Disc Front: Specialized Disc
Rims manufacturer	32-hole Mavic XM 117 Disc
Spoke nipples type	Brass Nipples
Spoke wheel	15ga. Straight Gauge Stainless Steel

Frame and Body Specs

Frame materials	Specialized A1 Aluminum
Frame type	TIG-welded
Handlebar construction	Specialized Aluminum
Handlebar extender	Optional
Handlebar stem details	Specialized Aluminum
Headset size	1 1/8 (inches) Threadless Ritchey Logic

Gearing Specifications

Bicycle chain	1/2 X 3/32 (inches) Shimano CN-HG73
Bottom bracket shell width	68 (millimeters) English
Bottom bracket type	113 (millimeters) Spindle Shimano BB-ES30
Crankset parts and sizes	22/32/44 Teeth Specialized Forearm II
Gear shift levers	Shimano Deore RapidFire SL
Rear gear set	11 - 32 Teeth 9-speed

Specialized Rockhopper Pro Disc Fork System Data

Derailleur (Front)	Bottom-pull and clamp-on 34.9 (millimeters) Shimano Deore
Derailleur (Rear)	Shimano Deore LX SGS
Fork material	Single Crown Aluminum
Fork type	80 (millimeters) Travel Answer Manitou Axel Elite

Other Specs of Specialized Rockhopper Pro Disc

Component group sets	Mountain Mix
Pedals details	Shimano PD-M505 SPD
Rear shock absorber	Not Available
Saddle seat	Specialized Body Geometry Pro
Seat post extension	30.9 (millimeters) Diameter Aluminum

Trek 820

General Infos

Model	820
Manufacturer	Trek
Year of production	2003
Current price	Check price Here ==>
Color choice	- Black Chrome - Metallic Purple -Baja Blue and Shine Silver
Sizes	- 13 (inches) - 15.5 (inches) - 17.5 (inches) - 19.5 (inches) - 21.5 (inches)

Wheels And Breaking System

Bike front tire	26 X 1.95 (inches) Bontrager Connection
Bike rear tire	Not Available
Bike wheel size	26 (inches) Wheels
Brakeset type	Shimano EF-29 Levers Aluminum Linear-pull Brakes
Hubs for disc brakes	Q and R Aluminum
Rims manufacturer	32-hole Matrix 550
Spoke nipples type	Brass Nipples
Spoke wheel	14ga. Straight Gauge Stainless Steel

Frame and Body Specs

Frame materials	Hi-tensile Steel
Frame type	TIG-welded
Handlebar construction	1.25 (inches) Rise Aluminum
Handlebar extender	Optional
Handlebar stem details	Aluminum Threadless
Headset size	1 1/8 (inches) Threadless Aheadset

Gearing Specifications

Bicycle chain	1/2 X 3/32 (inches) Union 600
Bottom bracket shell width	Not Available
Bottom bracket type	Not Available
Crankset parts and sizes	28/38/48 Teeth Suntour XCC-100
Gear shift levers	Shimano Altus EF-29
Rear gear set	13 - 30 Teeth 7-speed

Trek 820 Fork System Data

Derailleur (Front)	Shimano C051
Derailleur (Rear)	Shimano Altus
Fork material	Single Crown Aluminum
Fork type	63 (millimeters) Travel RST 191 CL

Other Specs of Trek 820

Component group sets	Mountain Mix
Pedals details	Nylon Platform
Rear shock absorber	Not Available
Saddle seat	Trek ATB
Seat post extension	Aluminum Micro-adjust