Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Aluminum -
Wheels 650b -
Groupset Tourney, Shimano -
Suspension Rigid -
Drivetrain 3 × 7 -
Brakes Mechanical Disc
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Specialized A1 Premium Aluminum, Ground Control Positioning, formed tubes, disc mount, fender/rack mounts
Suspension Fork
Roll Disc Steel, fender/rack mounts
Drivetrain
Rear Derailleur
Shimano Tourney, 7-speed
Front Derailleur
Shimano Tourney, top swing, 31.8mm band clamp
Shift Levers
Shimano EF51, EZ Fire Plus, 7-speed
Cassette
Shimano Tourney freewheel, 7-speed, 14-34t
Crank
Stout, forged alloy, 48/38/28T w/chainguard
Bottom Bracket
BSA, square taper, cartridge bearings
Chain
KMC Z51, 7-speed
Pedals
Specialized City platform
Wheels
Front Hub
Specialized disc, double-sealed, loose ball bearings, 9mm QR
Rear Hub
Specialized disc, loose ball bearings, QR
Rims
650b disc, double-wall aluminum, 15.5mm rim depth, 30mm internal width, 32h
Spokes
Stainless, 14g
Tires
Nimbus Sport, 60 TPI, BlackBelt protection, 650b x 2.3""
Brakes
Brakes
Tektro, mechanical disc, resin pads, 160mm rotor
Cockpit
Stem
Forged alloy, 17-degree rise, 31.8mm clamp
Handlebar
Specialized Roll, 6061 alloy, 15-degree backsweep, 5-degree upsweep, 125mm rise, 31.8mm
Seat
Saddle
Body Geometry The Cup, steel rails, 245mm
Seatpost
Dual-Bolt Diecast Head, AL6061 Post, Spring Suspension
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | SM | LG |
|---|---|---|
| Stack Reach Ratio | 1.69 mm | 1.79 mm |
| Bottom Bracket Height | 285 mm | 285 mm |
| Front Center | 618 mm | 645 mm |
| Rake | 55 mm | 55 mm |
| Trail | 84 mm | 77 mm |
| Stack | 590 mm | 651 mm |
| Reach | 350 mm | 364 mm |
| Top Tube Length | 599 mm | 639 mm |
| Seat Tube Angle | 67 ° | 67 ° |
| Seat Tube Length | 370 mm | 480 mm |
| Head Tube Angle | 68 ° | 69 ° |
| Head Tube Length | 155 mm | 215 mm |
| Chainstay Length | 484 mm | 484 mm |
| Wheelbase | 1093 mm | 1120 mm |
| Bottom Bracket Drop | 70 mm | 70 mm |
| Standover Height | 500 mm | 499 mm |
| Wheels | 650 | 650 |
About this model
Roll Sport Low Entry belongs to the Specialized Roll model. Specialized released 70 bikes variations of this model so far. Check out the entire range from 2017 of this model, by clicking this link.
Safety
Your safety is a top priority so always wear a helmet when you ride your bike. Moreover, wear the right clothing. You want to be visible to other drivers, so avoid wearing dark clothing.
Comfort bikes average price
According to our calculations, the average cost of a Comfort bike that is reliable is 360$. However, even though the average price of a Comfort bike is lower, you might still be able to get a top-quality bike. In conclusion, always check bike reviews and their components before making a purchase to make sure you don’t overpay.
Roll Sport Low Entry components
Fork material
When it comes to the fork, this bike has a steel one, which tends to be more flexible than carbon forks in general. However, a carbon fork is considerably lighter.
Wheels
When it comes to wheels, the Roll Sport Low Entry bike is equipped with the aluminum model. 650b wheels make a great choice if you want to sacrifice speed for comfort. However, they don’t perform so well when you go over bumps and obstacles.
Brakes
For your safety, it is important to have quality breaks on your bike. Specialized Roll Sport Low Entry has Mechanical Disc brakes installed. They are much easier to maintain than hydraulic disk brakes. However, they don’t have the stopping power of hydraulic brakes.