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  • OnGuard RockSolid U-Lock – Angle Grinder Resistant (3.5” x 6.9”) for Bicycle, Motorcycle, Powersport – 14mm Shackle, X4P Locking Mechanism, Lightweight, 5 Keys Included, Anti-Theft Protection
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OnGuard RockSolid U-Lock – Angle Grinder Resistant (3.5” x 6.9”) for Bicycle, Motorcycle, Powersport – 14mm Shackle, X4P Locking Mechanism, Lightweight, 5 Keys Included, Anti-Theft Protection

4.6 out of 5 stars 30 ratings

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Purchase options and add-ons

Brand OnGuard
Special feature Cut Resistant
Lock type Pin Tumbler
Item dimensions L x W x H 14 x 89 x 175 millimeters
Material Alloy Steel
Style U-lock
Colour Black
Number of pieces 1
Finish type Powder Coated

About this item

  • Angle Grinder Resistant: Proprietary coating resists angle grinder attacks for maximum theft protection.
  • X4P Locking Mechanism: Secures the shackle at four points for enhanced defense against pulling, jacking, and prying.
  • 14mm Shackle: Heavy-duty, durable shackle offers the strength needed to prevent cutting and sawing attacks.
  • Lightweight & Portable: Weighing only 3 lbs, it offers top-tier security without adding excessive bulk to your gear.
  • Anti-Theft Protection: Available for bicycles and for powersport vehicles (registration required, not available in all areas).

Frequently bought together

This item: OnGuard RockSolid U-Lock – Angle Grinder Resistant (3.5” x 6.9”) for Bicycle, Motorcycle, Powersport – 14mm Shackle, X4P Locking Mechanism, Lightweight, 5 Keys Included, Anti-Theft Protection
$386.64
Get it by Tuesday, Aug 5
Ships from and sold by 鶹.ca.
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$80.66
Get it by Tuesday, Jul 29
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Product description

The OnGuard RockSolid U-Lock provides unbeatable security for your bicycle, motorcycle, or powersport vehicle. With a proprietary coating that resists angle grinder attacks, this lock is designed to withstand the most common methods of theft. Featuring a 14mm shackle and X4P Quattro Bolt locking mechanism, it secures at four points to maximize protection against pulling, jacking, and prying. Despite its robust build, it weighs only 3 lbs, making it easy to carry without sacrificing security. The lock comes with five keys and an Anti-Theft Protection for bicycles and powersport vehicles with proper registration and qualification. With OnGuard RockSolid, you can lock up with confidence knowing your vehicle is protected by top-tier technology.

Product information

Technical Details

Manufacturer ‎OnGuard
Part Number ‎8590
Product Dimensions ‎1.4 x 8.89 x 17.48 cm; 1.36 kg
Item model number ‎8590
Size ‎Standard
Colour ‎Black
Style ‎U-lock
Finish ‎Powder Coated
Material ‎Alloy Steel
Shape ‎U Shape
Item Package Quantity ‎1
Number of Pieces ‎1
Special Features ‎Cut Resistant
Included Components ‎keys
Batteries Included? ‎No
Batteries Required? ‎No
Item Weight ‎1.36 kg
Country of origin ‎China

Additional Information

ASIN B0DG73D13P
Customer Reviews
4.6 out of 5 stars 30 ratings

4.6 out of 5 stars
鶹 Rank
Date First Available Sept. 7 2024

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OnGuard RockSolid U-Lock – Angle Grinder Resistant (3.5” x 6.9”) for Bicycle, Motorcycle, Powersport – 14mm Shackle, X4P Locking Mechanism, Lightweight, 5 Keys Included, Anti-Theft Protection


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This Item
OnGuard RockSolid U-Lock – Angle Grinder Resistant (3.5” x 6.9”) for Bicycle, Motorcycle, Powersport – 14mm Shackle, X4P Locking Mechanism, Lightweight, 5 Keys Included, Anti-Theft Protection
OnGuardRockSolid U-Lock – Angle Grinder Resistant (3.5” x 6.9”) for Bicycle, Motorcycle, Powersport – 14mm Shackle, X4P Locking Mechanism, Lightweight, 5 Keys Included, Anti-Theft Protection
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Price$386.64$39.99$109.47$225.19$158.86$74.01
Delivery
Get it by Tuesday, Aug 5
Get it by Tuesday, Jul 29
Get it by Thursday, Jul 31
Get it Aug 12 - 22
Get it by Tuesday, Jul 29
Get it by Tuesday, Jul 29
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Customer reviews

4.6 out of 5 stars
30 global ratings

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Top reviews from Canada

  • Reviewed in Canada on July 22, 2025
    Verified Purchase
    Remains to be seen how this performs versus the Litelok I also have as I haven’t been attacked yet, but the angle grinder tests are promising and this gives me peace of mind.

    It’s also a fair bit lighter as it relies on its rock diamond coating to combat diamond discs. My only complaint for now would be size, locking diameter. As it feels a bit smaller than a regular D lock. Good enough for the back tire but on my case too short for a front tire lock to my frame. YMMV. Would recommend measuring for your needs.

    If it was a lot longer than the Litelok and dx1000, it’s competition, it would be more useful as a bicycle lock also taking advantage of its weight. Over time I did buy another so I could interlock them both but I’m in a high risk city of Toronto, otherwise I don’t think you need to go that far. Relative to the cost of my bike I feel it’s good value for the protection it offers. In the ever escalating battle between thieves and cyclists you can’t afford to use unprotected regular D locks anymore. Also as a rule of thumb always good to have one lock more than the bike next to you!

Top reviews from other countries

  • 鶹 Customer
    5.0 out of 5 stars Top choice
    Reviewed in Spain on July 2, 2025
    Verified Purchase
    Very light worth it
  • Anton Chistik
    5.0 out of 5 stars Very secure lock
    Reviewed in Germany on June 2, 2025
    Verified Purchase
    best lock I ever had. It is light and solid
  • MR D FROM QUEENS NY
    5.0 out of 5 stars THE HEAVY DUTY LOCK
    Reviewed in the United States on May 18, 2025
    Verified Purchase
    THIS U LOCK IS HEAVY DUTY I MEAN EVERY LOCK CAN BE BROKEN INTO BUT THIS THING WILL TAKE LIKE A DAY TO DO SO. THE U LOCK COMES WITH LIKE 5 KEYS SO YOU LIKE DONT HAVE TO HIRE SOME ONE TO TAKE THE U LOCK OFF IF YOU SHOULD LOSE THE KEY. THERE ARE MANY U LOCKS OUT THERE BUT THIS ONE IS WORTH IT FOR YOUR VERY EXPENSIVE BIKE OR OTHER EQUIPMENT.
  • Scott Burkhardt
    5.0 out of 5 stars Great lock.
    Reviewed in the United States on June 2, 2025
    Verified Purchase
    Rock solid. I trust this lock.
  • Andy
    5.0 out of 5 stars Bikelock
    Reviewed in Germany on May 14, 2025
    Verified Purchase
    Does what it should.