Ultra Groundpounder 330 Rigid - 2015 Specifications and Reviews

The 2015 Ultra Groundpounder 330 Rigid is a custom cruiser built for riders seeking authentic bobber style with modern reliability. Powered by a polished S&S V-twin engine paired with a 6-speed belt drive, it delivers classic cruiser character with straightforward performance. Known for its aggressive stance, rigid frame geometry, and distinctive 330-18 rear tire, this bike suits experienced riders who value raw, stripped-down aesthetics.

2015
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General information

CategoryCustom / cruiser
Year2015
ModelUltra Groundpounder 330 Rigid
 
 

Engine and Transmission Specifications

Exhaust system2-into-2 exhaust
DrivelineWet primary chain drive
Transmission type,final driveBelt
Gearbox6-speed
Cooling systemAir
IgnitionSpyke Ignition System
Fuel systemCarburettor. Super G Carburetor
Engine detailsS and S engine, polished
Engine typeV2, four-stroke
Capacity:1573.25 ccm (96.00 cubic inches)

Brakes, suspension, Frame and wheels

Wheels60 Spoke Wire Wheels
Rear brakesSingle disc. Ultra calliper
Front brakesSingle disc. Ultra callipers
Rear tyre330-18
Front tyre120-21
Rake (fork angle)40.0°
Frame typeCenter Balanced Fully Engineered Chassis. Rigid right side drive
 
 

Physical measures and capacities

Wheelbase2,489 mm (98.0 inches)
Seat height660 mm (26.0 inches) If adjustable, lowest setting.

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
CommentsStandard downtube. 5 inch backbone. 2 inch downtube stretch.
StarterElectric
Color optionsGloss black, flat black

Performance Profile & Rider Fit

Best For

Track5%
City25%
Cornering15%
Daily Riding40%
Touring40%
Passenger20%

Rider Profile

Best ForThis is a machine best suited to experienced riders who understand the quirks of a rigid frame, hardtail custom with an extreme 330mm rear tyre and no rear suspension.
PurposeBuilt as a low-slung, head-turning custom cruiser for boulevard cruising and show-quality presence rather than performance or distance riding.
Rider FitThe low 660mm seat height is approachable, but the raked-out 40-degree fork, long 2489mm wheelbase, and massive rear tyre demand strength and confidence at low speed and in turns.
CharacterA bold, radical custom statement built around a polished S&S V-twin, rigid chassis, and an oversized rear tyre, prioritizing style and attitude over handling.
Not Ideal ForThis is not the bike for riders wanting agile cornering, long-distance comfort, passenger accommodation, or any kind of off-road capability.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2015 Ultra Groundpounder 330 Rigid Rider Ergonomics Assessment

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Feet:

At 660mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2015 Ultra Groundpounder 330 Rigid, with a cramped knee angle of around 80 degrees and a slightly forward riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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