Dirtmaster BIG BERTHA 1999 VS Nirve HYPNOTIC 2001 specs comparison
Dirtmaster Big Bertha
General InfosModel | Big Bertha |
Manufacturer | Dirtmaster |
Year of production | 1999 |
Current price | Check price Here ==> |
Color choice | - Chrome-Plated- Red- Yellow-Black |
Sizes | - Pro XL |
Sizes | - Pro XL |
Wheels And Breaking System
Bike front tire | 20 X 2.25 (inches) Kenda K-841 |
Bike rear tire | Not Available |
Bike wheel size | 20 (inches) Wheels |
Brakeset type | Dia-Compe Tech 99 LeversDia-Compe 990 Brakes |
Hubs for disc brakes | Joy Tech Jy A085SBT |
Rims manufacturer | 48-holeAlex Supra |
Spoke nipples type | Brass Nipples |
Spoke wheel | 2.0 (millimeters) Straight GaugeDa-Sen Stainless Steel |
Frame and Body Specs
Frame materials | 4130 chromoly c |
Frame type | TIG-welded |
Handlebar construction | Dirtmaster Hoochie |
Handlebar extender | Not Available |
Handlebar stem details | Odyssey Bang |
Headset size | 1 1/8 (inches) Threadless Aheadset SE-1 F and S With Odyssey Gyro Detangler |
Gearing Specifications
Bicycle chain | 1/2 X 1/8 (inches)KMC 410H |
Bottom bracket shell width | American 24tpi |
Bottom bracket type | YST BB 621 |
Crankset parts and sizes | 44 Teeth1-piece Chromoly 180 (millimeters) |
Gear shift levers | Not Available |
Rear gear set | 16 Teeth1-speed |
Dirtmaster Big Bertha Fork System Data
Derailleur (Front) | Not Available |
Derailleur (Rear) | Not Available |
Fork material | Unicrown Crown4130 Chromoly |
Fork type | Dirtmaster Street Fork |
Other Specs of Dirtmaster Big Bertha
Component group sets | Not Available |
Pedals details | Wellgo LU-313U |
Rear shock absorber | Not Available |
Saddle seat | Team Products Embroidered |
Seat post extension | 25.4 (millimeters) DiameterPrimo Rod |

Nirve Hypnotic
General InfosModel | Hypnotic |
Manufacturer | Nirve |
Year of production | 2001 |
Current price | Check price Here ==> |
Color choice | - Chrome-Plated- Orange- Silver-Black |
Sizes | - Pro |
Wheels And Breaking System
Bike front tire | 20 X 1.95 (inches) Voxom Rubbers Sensitive |
Bike rear tire | Not Available |
Bike wheel size | 20 (inches) Wheels |
Brakeset type | Aluminum U-brake LeversTektro 906A U-brake Brakes |
Hubs for disc brakes | Voxom Aluminum Trail |
Rims manufacturer | 48-holeAlex X-303 |
Spoke nipples type | Brass Nipples |
Spoke wheel | 14gVoxom UCP |
Frame and Body Specs
Frame materials | Hi-tensile Steel |
Frame type | TIG-welded |
Handlebar construction | Voxom 2-piece |
Handlebar extender | Not Available |
Handlebar stem details | Voxom Aluminum Trail |
Headset size | Dia-Compe SB |
Gearing Specifications
Bicycle chain | 1/2 X 1/8 (inches)KMC |
Bottom bracket shell width | American |
Bottom bracket type | Loose Ball |
Crankset parts and sizes | 43 TeethVoxom 1-piece |
Gear shift levers | Not Available |
Rear gear set | 16 Teeth1-speed |
Nirve Hypnotic Fork System Data
Derailleur (Front) | Not Available |
Derailleur (Rear) | Not Available |
Fork material | Unicrown CrownChromoly |
Fork type | Nirve |
Other Specs of Nirve Hypnotic
Component group sets | Not Available |
Pedals details | Voxom Nylon Platform |
Rear shock absorber | Not Available |
Saddle seat | Voxom Trail |
Seat post extension | 26.0 (millimeters) DiameterVoxom Steel |
Useful links and guides ....
- To know more about this exacte bike, Dirtmaster provided us with the latest version of its Big Bertha bike manual
- Find All parts, tires and accessories of Dirtmaster Big Bertha Freestyle here
- Get your Nirve Hypnotic manual book version yo know further about this bike
- Saddles, tires And mechanical parts for Nirve Hypnotic Freestyle here