Thunder Softball

Hand-built for home-runs

The PER4MAX Thunder (Wheelchair Softball Edition) is a handcrafted, rigid sports wheelchair engineered specifically for the high-velocity impacts, rapid base-running cuts, and rough blacktop surfaces of National Wheelchair Softball Association (NWSA) competition. Hand-built in the USA to the athlete's exact measurements, it combines explosive acceleration off the line with maximum lateral stability for fielding and swinging.

Key Softball-Specific Enhancements

• Reinforced Front Bumper: An integrated, reinforced front bumper protects the lower legs during base-sliding, collisions on the diamond, and tags at the plate while shielding the frame from rough asphalt.

• Torque-Optimized Seating Geometry: Built with a custom seat dump (bucket angle) and low-profile backrest to secure your pelvis, allowing maximum upper-body rotation and core power when swinging a bat or throwing across the diamond.

• Base-Running Camber & Tracking: Offered in 12° to 20° camber angles to widen your stance, allowing sharp, aggressive cornering around bases without risking tip-overs or losing momentum.

• Anti-Tip Safety System: Features a rigid 5th wheel (or optional dual rear casters) to prevent rearward tipping when leaning back to field pop-ups or generating maximum rotational torque during a hit.

Built for Blacktop & Court Endurance

Wheelchair softball presents unique mechanical stress because it is played entirely on asphalt or concrete surfaces. The Thunder Softball configuration addresses this with heavy-duty hardware upgrades:

• Reinforced Caster Assemblies: Heavy-duty caster stem bolt housings and high-impact caster forks absorb constant ground chatter and blacktop friction without loosening or losing alignment.

• 5/8" Axle Upgrade Option: Prevents axle flexing during hard lateral stops and fast accelerations on high-traction asphalt.

• Treaded & High-Durability Tires: Compatible with non-marking high-pressure pneumatic street tires or high-durability treaded tires that grip smooth or worn asphalt in all temperature conditions.

Standard Features

• Custom-built aircraft-grade aluminum frame
• Rigid 5th wheel
• Tension-adjustable backrest upholstery
• Adjustable center of gravity
• Average weight: approximately 19.0 to 20.5 lbs.*
• Black nylon upholstery
• 3-inch front casters
• Impact-absorbing backrest bar foam
• 2-inch foam cushion
• 3-year limited warranty

Every PER4MAX wheelchair is built to order. Available features and configurations vary based on the selected sport, athlete measurements, playing position, and individual performance goals.

Available Options

• Ultra-lightweight 7000-series aluminum frame
• Titanium frame upgrade
• Powder-coated or polished aluminum frame finish
• 5/8-inch axle
• Removable 5th wheel
• 6th wheel configuration
• Adjustable rear caster stem set
• Spinergy wheels (SLX, X-Lace, R10)
• 12-tab handrims
• Custom footrest adaptations
• Custom powder coat and color combinations
• Click straps (lap, foot, and waist)
• BodyPoint lap and waist straps
• Leather upholstery with air mesh
• Carbon fiber accessories
• Solid seat plate
• Solid 2-inch foam cushion or custom seating options
• Continuous backrest
• Bucket seat
• Welded side guard w/ rail

Contact the PER4MAX sales team or download the order form to begin designing your custom Thunder Softball.