The 20" Alpha Three is our smallest geared bike. The NEW 9-speed Microshift drive train and 11-36T wide range gearing is the real deal and gives growing riders truly usable gear range.
Kid Optimized CrankPrevelo crank lengths are custom sized for each size bike to make sure little riders have optimum pedal ergonomics. And they have ultra-narrow Q-factors to match the narrow hips of young cyclists. If that sounds like technical mumbo jumbo, here's the point - Prevelo cranks will help make small riders more comfortable and efficient on their bike.
BOXT Rear Stays and Forged Dropouts
Kids are going to put their bikes through the ringer, so Prevelo bikes are built kid tough with robust BOXT rear chainstays and seat stays, and BMX track style forged dropouts that shroud the rear axle.
Confidence Inspiring Geometry
The Alpha One features Prevelo's signature confidence inspiring geometry. Prevelo geometry utilizes a low bottom bracket that lowers the center of gravity of the bike and rider, making for a more agile and confident ride.
Kid Friendly Hubs
The hubs are equipped with rounded axle bolts that minimize hard edges. And because kids are going to run their bikes through muck, the hubs have rubber seals to keep out dirt and grime.
Kid Optimized Cockpit
This is where little riders command these steed. It's decked out with ultra small diameter grips and short reach brake levers that are optimized for small hands.
Low Standover Height
A low minimum seat height and dropped top tube help accomodate the smallest riders.
Specifications:
- Weight (including pedals) 18.9 lbs / 8.6 kg
- Minimum Saddle Height 20.7 in / 525 mm
- Maximum Saddle Height 25.5 in / 648 mm
- Bottom Bracket Height 8.1 in / 205 mm
- Gain Ratio 1.9 - 6.7
- Standover (ground to top of top tube) 17.5 in / 444.5mm
- Wheel Size: 20"
- Age: 5 to 9 years
- Inseam: 19" - 23"
- Prevelo confidence inspiring low and narrow geometry. Prevelo geometry keeps the rider low, balanced and in control.
- Lightweight 6061 aluminium frame with custom formed tubing.
- Lightweight aluminium alloy fork with chromoly steerer.
- Tektro front and rear v-brakes.
- Lightweight Allen head front and rear wheel skewers for secure wheel installation.
- Three piece crank with squared taper cartridge bearing bottom bracket and ultra narrow Q factor.
- Custom made cranks. All Prevelo cranks are sized specifically for each model bike, down to the millimetre.
- NEW Microshift 9-speed drivetrain. Uses a shorter pulley cage without comprising gear ratio width. Because kids’ bikes have small wheel diameters, rear derailleurs on kids bikes hang low and close to the ground. The Prevelo Alpha bikes use smaller cage derailleurs to keep things high and away from the ground.
- Microshift Trigger Shifters. Small hands have a hard time using twist shifters. We use reliable silky smooth thumb shifters. They are easy for small hands to operate, and operate just like shifters on high performance bikes.
Product Code | PBA2002-SL |
---|---|
Brand | Prevelo |
Gender | Junior |
Frame | 6061 heat treated aluminium alloy custom formed tubing |
Fork | aluminium alloy blades with chromoly steerer tube - 35mm rake |
Shifters | Microshift Thumb Shifter |
Derailleur (Rear) | 9-speed Microshift |
Brakes | Tektro aluminium alloy V-brake |
Crankset | Prevelo anodized alloy 3-piece square taper with 110MM crank length. |
Cassette | 11-36T |
Hub Front | Lightweight alloy 1-piece forged CNC |
Hub Rear | Lightweight alloy 1-piece forged CNC |
Rims | aluminium with grinded sidewalls |
Tyres | Kenda Small Block Eight Pro 20 ×1.5 |
Handlebar | Prevelo aluminium big bore - 560mm width x 40mm rise with 31.8mm to 22mm taper |
Stem | Aluminium 35mm extension |
Headset | 1 1/8" threadless |
Saddle | Prevelo small kid saddle |
Pedal | Composite with 9/16 chromoly axle |
Wheel Size | 20 inch |
Number of Gears | 9 |
Ready to ride
Every bike from Start Fitness is fully checked & assembled before despatch and will arrive, almost, ready to ride. Each bike is assembled by one of our CyTech accredited mechanics and then packed into one of our custom boxes.
*This process has a lead time of 5-7 working days.
Unfortunately during peak times this may be slightly delayed. We will however, aim to despatch your bike as quickly as possible. Minimal assembly, with basic tools, is required before you can ride. Assembly tools are not usually included.
Making sure you are home
Once fully checked and boxed, we will contact you to arrange a suitable delivery date when you will be home to take delivery. Our bikes are despatched with a premium delivery service which usually delivers next working day (excludes weekends & bank holidays) for mainland UK orders, it may take slightly longer for some areas, Northern Ireland, Channel Islands and outlying Scottish areas. European bike deliveries usually take approximately one week.
Taking Delivery
Any mechanical or cosmetic issues need to be reported to us within one week of the delivery date. If you do not plan on using the bike straight away, we advise that you remove it from the box and check it over ASAP as we cannot be responsible for any reported issues (other than standard warranty issues) later than one week from the date that the bicycle was delivered.
First Service
After a few weeks of riding (we recommend around 6-8 weeks, regardless of how much the bike has been used), a new bike will need a service to make final adjustments and to re-check all nuts and bolts. This is necessary as the bike goes through a ‘bedding in’ phase, after which, final adjustment may be necessary. We recommend that this is carried out by a CyTech qualified mechanic.
It is important to have these checks carried out to prevent any avoidable problems which may not be covered by warranty and to ensure the smooth running of your bicycle. If you’re local to us, we’re able to offer this first service free of charge* at our Newcastle store (NE1 6JE). You’ll just need to call our workshop on 0191 917 3825 to book your service in, and don’t forget to bring your proof of purchase when you drop the bike off with us.
If you’ve had the bike delivered, it will be your responsibility to ensure a first service is carried out at a trusted bike shop local to you, preferably by a Cytech certified mechanic. Start Fitness are unfortunately not able to cover any costs associated with this service if carried out by another store.
*Please note that this complimentary check-over does not include any labour to replace worn parts or to fit new accessories. All bikes should be delivered to us in a clean and serviceable condition, or a £15 cleaning charge will be payable.
Bike Servicing
Bicycles need to be serviced regularly, as a guideline we would advise on at least one full service per year and/or a standard service twice a year. If the bike is used regularly in adverse conditions, more regular servicing may be required.
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