Ninety One Viper
by Ninety One
Category: MTB
The Ninety One Viper is a MTB bike from Ninety One. It's built around a 18.5" hi-tensile carbon steel frame robotic tig welded frame and a 91 suspension fork. Equipped with f/r mechanical disc brakes brakes. Rolls on 27.5"/69cm wheels with Hi-Traction 27.5” x 2.1”/2.2" Wide Nylon Tyres tyres. Weighs approximately 18.5 kg.
Ninety One Viper Specifications
Frame & Fork
| Frame | 18.5" Hi-Tensile Carbon Steel Frame Robotic TIG Welded |
| Frame Height | 18.5" |
| Fork | 91 Suspension |
| Headset | NECO Threadless Low Friction |
Wheels & Tyres
| Rims | Double-Wall Rust-Free Alloy Rim |
| Hubs | Durable Steel Mega Hubs with Front QR |
| Wheel Size | 27.5"/69cm |
| Tyres | Hi-Traction 27.5” x 2.1”/2.2" Wide Nylon Tyres |
Other Specifications
| Accessories | Reflectors & Kickstand |
| Highlights | 18.5" Hi-Tensile Steel Frame; 21 Hi-Speed SHIMANO Gears; Fast & Dynamic Disc Brakes; 91 Branded Suspension |
| Age | 13+ Yrs |
| Height | 5'5"-5'11" |
| Shifting | Shimano Tourney 21-Speed Gears |
| Derailleur | Shimano Tourney FD-TY500 & RD-TY300 |
| Stickers | Premium Water Transfer Decals in Stunning Color Combinations |
Drivetrain
| Crankset | Durable, Precision 3-Speed Steel |
| Bottom Bracket | Kenli/Neco Sealed Cartridge |
| Cassette | 7 Speed Freewheel |
Brakes
| Brakes | F/R Mechanical Disc Brakes |
Cockpit & Seating
| Handlebar | Steel |
| Stem | Alloy Stem |
| Saddle | Premium Quality Comfortable Saddle |
Weight & Warranty
| Weight | 18.5 kg |
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Frequently Asked Questions
Common questions about MTB bikes like this one.
What frame and fork does the Ninety One Viper have?
The Ninety One Viper comes with a 18.5" Hi-Tensile Carbon Steel Frame Robotic TIG Welded frame and a 91 Suspension fork.
What brakes does the Ninety One Viper use?
The Ninety One Viper is equipped with F/R Mechanical Disc Brakes.
Are mountain bikes hard to ride?
Not really - their sturdy build and grippy tyres actually make rough terrain easier to handle than on a standard bike.
Which wheel size should I choose - 26", 27.5", or 29"?
26" suits city riding and light trails, 27.5" is a versatile choice for both city and off-road use, and 29" rolls best over obstacles for serious off-road and downhill riding.
Can I ride an MTB on paved city roads?
Yes - mountain bikes handle city streets fine, though they're not as fast as a road or hybrid bike on smooth pavement.
How much weight can an MTB carry?
Most MTBs handle riders up to roughly 100-120kg, though this varies by brand and model - check the specific bike's listing for exact figures.
What does suspension actually do?
It absorbs shocks from rough terrain, giving a smoother, more controlled ride with better traction on rocky trails or potholed roads.