RockSolid U-Lock (8590)

The OnGuard RockSolid U-Lock is engineered for riders who demand maximum protection against modern theft tools. Featuring a proprietary angle-grinder-resistant coating combined with a 14 mm tri-radius hardened steel shackle, this lock is built to withstand saws, cutting wheels, leverage bars, and twisting attacks commonly used by thieves. Its X4P Quad Locking Mechanism secures the shackle on all four sides to prevent spreading or rotation under force. Despite its extreme strength, it remains portable at only 3 lbs and includes OnGuard’s industry-leading anti-theft coverage for bicycles and powersport equipment. Ideal for high-risk urban areas, e-bikes, cargo bikes, and daily commuters who require advanced security.

• Angle-Grinder Resistant Coating: Proprietary exterior layer disrupts cutting wheels and saw blades, dramatically increasing resistance to grinder-based attacks.
• X4P Quad Lock Protection: Four-sided locking mechanism keeps the shackle secured on all ends, blocking twisting, prying, and separation attacks used by skilled thieves.
• Premium 14 mm Hardened Steel: High-strength shackle withstands bolt cutters, leverage tools, hammers, and freeze-spray attempts for high-risk environments.
• Portable High-Security Build: Weighs just 3 lbs, making it easier to carry while still delivering serious anti-theft performance for e-bikes and commuter bikes.
• Anti-Theft Coverage Included: Backed by OnGuard’s protection plan—up to $5001 bicycle and $1251 powersport coverage for added peace of mind.


Manufacturer Sku: 8590
Todson Sku: 45008590