Zephyr ROCKET 1998 VS Specialized HOTROCK 24 21-SPEED STREET BOYS 2015 specs comparison

Zephyr Rocket

General Infos

Model	Rocket
Manufacturer	Zephyr
Year of production	1998
Current price	Check price Here ==>
Color choice	- red -Black
Sizes	- Boys
Sizes	- Boys

Wheels And Breaking System

Bike front tire	12 1/2 X 2 1/4 (inches) Comp III Style
Bike rear tire	Not Available
Bike wheel size	12 (inches) Wheels
Brakeset type	Coaster Brake
Hubs for disc brakes	Rear: Coaster Brake With Training Wheels Nutted Front: Steel
Rims manufacturer	20-hole Steel
Spoke nipples type	Brass Nipples
Spoke wheel	2.0 (millimeters) Straight Gauge Steel

Frame and Body Specs

Frame materials	Hi-tensile Steel
Frame type	TIG-welded
Handlebar construction	Not Available
Handlebar extender	Not Available
Handlebar stem details	Steel
Headset size	1 (inches) Steel

Gearing Specifications

Bicycle chain	1/2 X 1/8 (inches)
Bottom bracket shell width	American
Bottom bracket type	One Piece
Crankset parts and sizes	36 Teeth 1-piece 4 1/2 (inches)
Gear shift levers	Not Available
Rear gear set	16 Teeth 1-speed

Zephyr Rocket Fork System Data

Derailleur (Front)	Not Available
Derailleur (Rear)	Not Available
Fork material	Unicrown Crown Hi-tensile Steel
Fork type	Zephyr

Other Specs of Zephyr Rocket

Component group sets	Not Available
Pedals details	Resin Platform
Rear shock absorber	Not Available
Saddle seat	Zephyr
Seat post extension	Steel Pillar

Specialized HOTROCK 24 21-SPEED STREET BOYS

General Infos

Model	HOTROCK 24 21-SPEED STREET BOYS
Manufacturer	Specialized
Year of production	2015
Current price	Check price Here ==>
Color choice	-Red and White and Black
Sizes	- Standard size for all

Wheels And Breaking System

Bike front tire	24x1.5 (inches) 30TPI Flak Jacket Protection Wire Bead Specialized Nimbus
Bike rear tire	Not Available
Bike wheel size	24
Brakeset type	60 (millimeters) Pads Die-cast Alloy V-brake
Hubs for disc brakes	3/8 (inches) Axle 32h 32h Alloy Dual Lock Nuts With 17 (millimeters) Contact Side Dual Lock Nuts With 17 (millimeters) Contact Side Loose Ball Loose Ball Nutted Steel Nutted Alloy
Rims manufacturer	32h Alloy Single Wall Pin Joint 24 (inches)
Spoke nipples type	Not Available
Spoke wheel	14g With Brass Nipple Stainless

Frame and Body Specs

Frame materials	Aluminum
Frame type	Forged Dropouts Formed Toptube and downtube Replaceable Alloy Derailleur Hanger Specialized A1 Premium Aluminum
Handlebar construction	10-degree Backsweep 25.4 (millimeters) 4-degree Upsweep Steel Kid's Flat
Handlebar extender	Not Available
Handlebar stem details	20-degree Rise 4-bolt Forged Alloy Ahead
Headset size	1/8 (inches) Sealed Cartridge Bearings Ahead

Gearing Specifications

Bicycle chain	1/2 (inches)x3/32 (inches) KMC HV500
Bottom bracket shell width	Not Available
Bottom bracket type	Semi-cartridge With Bolts 68x119 (millimeters)
Crankset parts and sizes	42/34/24 Steel With Chainguard Forged Alloy Arms
Gear shift levers	7-speed Shimano Revo-Shift
Rear gear set	14-28 7-speed Freewheel Shimano

Specialized HOTROCK 24 21-SPEED STREET BOYS Fork System Data

Derailleur (Front)	Shimano Tourney
Derailleur (Rear)	7-speed MegaRange Shimano TX-35
Fork material	Aluminum
Fork type	1-1/8 (inches) Steerer Straight Blade Alloy

Other Specs of Specialized HOTROCK 24 21-SPEED STREET BOYS

Component group sets	Youth Mix
Pedals details	9/16 (inches) With Reflectors Composite Platform
Rear shock absorber	Not Available
Saddle seat	7 (millimeters) Rails With Bumper Specialized Kids
Seat post extension	27.2 (millimeters) Single Bolt Alloy