A conventional disc lock is carried with you and clamped onto the brake disc when you park. ROADLOK's lock body bolts to the front brake caliper and stays on the bike. When you park, you insert the BrakeBolt™ locking pin through the brake disc and turn the key. When you ride, the BrakeBolt is in your pocket, not in the lock. Nothing to carry but a small locking pin.

Forget a disc lock and it turns with the disc until it hits the caliper or fork, which can damage the bike or tip it over. Forget the BrakeBolt and the bike stays put. The lock body is bolted to the caliper, so nothing can rotate into the caliper or fork.

No. The BrakeBolt goes in only when the bike is parked. While you ride, it's on its lanyard or in your pocket. The dust plug fills the BrakeBolt chamber, and the rubber lock cylinder cap loops over the head of the dust plug and covers the keyhole.

Reference: BrakeBolt Pin Troubleshooting

The bike stays put. The lock body is bolted to the caliper, so nothing can rotate into the caliper or fork. Try to ride off with the BrakeBolt in the lock and the bike stalls.

An independent lab found that, fitted correctly, it can't affect how the brake works. A racer who tested it on track reported no impact on handling or performance.

ROADLOK adds about 400 g to the bike. It sits on the caliper, not on the wheel or the disc, so it adds nothing that spins. Even by the rule of thumb that counts each unsprung gram like six sprung ones, that's about 2.4 kg, or 3 liters of fuel in the tank.

Yes. ROADLOK doesn't interfere with a factory ABS system.

ROADLOK fits radial-mounted front brake calipers. The model depends on the distance between the caliper's two mounting bolts, measured center to center:

• 100 mm: most Brembo and BMW-branded radial calipers. XRA-100R or XRA-100L.
• 108 mm: most Nissin and Tokico radial calipers. XRA-108R.
• 80 mm: most Bybre radial calipers. XRA-80R or XRA-80L.

Select Honda Nissin calipers with a tall bleed valve in the center of the caliper body take the XRA-C100R. Axial calipers don't fit.

The fitment checker at roadlok.com/fitment gives the model, side and version for your bike. If your bike isn't there, email a photo of the front caliper, taken from beside the bike, to support@roadlok.com.

Reference: Is my caliper radial or axial?

ROADLOK mounts on one front caliper. On a twin-disc bike either side works, and we recommend the right, away from the side stand. On a single-disc bike it goes on the side the disc is on. The XRA-100L and XRA-80L are the left-side models. The XRA-108R and XRA-C100R are right side only.

We don't recommend it. The holes in the left and right discs aren't guaranteed to line up, so one BrakeBolt can click through while the other can't. Fit one lock on one caliper.

The lock body is the same. The mounting bolts differ in thread pitch: BMW and Harley-Davidson take a 1.5 mm coarse thread, and every other make takes a 1.25 mm fine thread. Choose by the make of your bike. The wrong pitch damages the fork lower.

Reference: Mounting Bolts: Thread Pitch, Depth and Torque

We can't guarantee it. Our fitment list is based on the original brake discs, and an aftermarket disc can put its holes in different places. Find the spacer by testing, as the installation manual describes.

Reference: XRA Installation Manual

ROADLOK is installed on your bike's braking system, and improper installation can cause serious injury or death. We recommend installation by a trained technician or a dealership. The full installation warning is in the XRA Installation Manual, and there's a step-by-step guide for your phone at roadlok.com/install.

Reference: XRA Installation Manual

No. Fit the lock with the bike on its side stand on level ground, on a center stand, or on a workshop lift. At home you don't need a special stand or lift.

Reference: XRA Installation Manual

The lock body with the lock cylinder, the BrakeBolt, two keys with the key code tag, a dust plug, a rubber lock cylinder cap, a lanyard, and the mounting bolts, spacers and shims for your lock model and the make of your bike, including one pair of 1 mm stainless steel shims. You supply the tools, including a torque wrench, and a medium-strength threadlocker. The installation manual lists them.

Reference: XRA Installation Manual

Start with the spacer the fitment checker gives for your bike, if it gives one. Otherwise start with the shortest spacer that lets the lock body clear the caliper. Hand-tighten the bolts, insert the BrakeBolt, and roll the bike forward or backward until the BrakeBolt clicks through a disc hole, normally within a few centimeters. If it hasn't passed through a hole within a quarter turn of the front wheel, take both bolts out and try the next longer spacer. A 1 mm shim on each bolt, next to the spacer, gives a final 1 mm adjustment.

Reference: XRA Installation Manual · XRA Spacer Reference

Yes. Apply a medium-strength threadlocker such as Loctite 243 to the mounting bolts before torquing, one bolt at a time, and don't grease the threads. Most front caliper bolts take between 25 and 40 N·m (about 18 to 30 ft-lb), and most BMW models specify 38 N·m (about 28 ft-lb). Always confirm the figure for your bike in its owner's manual or workshop manual.

Reference: Mounting Bolts: Thread Pitch, Depth and Torque

Before fitting, write down the key code from the metal tag on the keys and the serial number from the label inside the bridge of the lock body. Once the lock is fitted, register at roadlok.com/registration with the spacer letter, bolt length and any shims you used. Replacement keys can only be cut from the key code, so registering is how you get new keys if both originals are lost.

Reference: XRA Installation Manual

To lock: turn the key fully clockwise and insert the BrakeBolt into the lock body. Turn the key fully counterclockwise and remove it, then roll the bike forward or backward until the BrakeBolt clicks through a hole in the brake disc. The click tells you it's locked, and the front wheel can't turn.

To ride: turn the key fully clockwise and pull the BrakeBolt out. Fit the dust plug in the BrakeBolt chamber and the rubber cap over the keyhole.

Reference: BrakeBolt Pin Troubleshooting

The BrakeBolt goes in only with the key turned fully clockwise, to the stop. If grit has got into the BrakeBolt chamber, rinse it with fresh water and blow it out with compressed air.

Reference: BrakeBolt Pin Troubleshooting

Keep the key turned fully clockwise. With one hand, press upward on the handlebar on the same side of the bike as the lock, and pull the BrakeBolt with the other. If the bike is on its side stand, also turn the front wheel straight ahead with that handlebar. If it's still held, rock the bike back and forth slightly while you pull. Don't use pliers on the BrakeBolt or lever against the lock body. To avoid it, park on level ground where you can, and on a slope leave the bike in gear.

Reference: BrakeBolt Pin Troubleshooting

Every XRA lock uses the same BrakeBolt. Order a replacement from the store.

Replacement BrakeBolt

Replacement keys are cut to your key code and come as a pair. If you don't have the code, email support@roadlok.com. We can find it if the lock was registered.

Replacement Keys

Every 2 to 3 months, rinse the lock cylinder with fresh water, dry it with compressed air and puff a dry lubricant such as graphite into the keyhole. Do it more often in harsher climates or riding conditions, such as salted roads or a bike kept outdoors. Don't use oil, spray lubricants or white lithium grease for routine care. While you ride, keep the dust plug in the BrakeBolt chamber and the rubber cap over the keyhole. If the bike is stored for a long time, operate the lock and clean and lubricate the cylinder at regular intervals.

Reference: Lock Cylinder: Care, Troubleshooting and Replacement · Rubber Lock Cylinder Cap, 2 pack

Apply graphite first. Only if graphite doesn't free it, use a penetrating oil such as WD-40, then clean and lubricate the cylinder as for routine care. If the cylinder doesn't recover, email support@roadlok.com for a replacement. It comes with two new keys and a new service hole sticker, and the new key code needs registering at roadlok.com/registration.

Reference: Lock Cylinder: Care, Troubleshooting and Replacement

The service hole sticker covers the cross-hole used to replace the lock cylinder. It keeps road dust and debris out of the lock, so leave it in place.

Reference: Lock Cylinder: Care, Troubleshooting and Replacement

The lock body moves; the mounting hardware may not. A bike of a different make can need a different thread pitch and different spacers, so order the mounting kit for the new bike. New locks already come with all the mounting hardware they need, and a kit is only needed for a move. Check the new bike in the fitment checker first, or email support@roadlok.com with your lock model and the new bike. Keep the original caliper bolts and the unused spacers, shims and bolts.

Reference: Mounting Bolts: Thread Pitch, Depth and Torque · XRA Replacement Mounting Kits

No. Unbolting the lock body from the caliper removes the mounting, not the lock. The BrakeBolt stays through the disc and the lock stays locked with the key. What's left is a locked disc lock, which turns with the wheel until it hits the caliper or fork and stops. Beating it still takes the same attack on the cylinder or the BrakeBolt as any disc lock.

ROADLOK is built for crimes of opportunity: a thief who tries to push a parked bike away or attacks the lock where it stands. A push does no damage, because the lock body is bolted to the caliper and nothing can move. Professional theft is often more coordinated, and no disc lock stops a bike being lifted into a van. For a bike parked at home overnight, a chain to a ground anchor adds another layer.

Sold Secure Powered Cycle Diamond, Sold Secure's highest Powered Cycle rating, approved in July 2026. ART 4-star approval in the Netherlands, MBT-4246, valid to 22 February 2029. Both are series approvals covering the XRA range, including the XRA-C100R.

Insurers set their own conditions. Check your policy for the scheme and grade it asks for. We can't give insurance advice.

Yes. The lock body, BrakeBolt, keys and mounting hardware carry a limited lifetime warranty against defects in materials and workmanship, for the original owner. The lock cylinder is covered for 2 years from purchase, with routine care. The dust plug, rubber lock cylinder cap and lanyard are maintenance items and aren't covered. Full terms: roadlok.com/warranty.

In the UK, from roadlokuk.co.uk. In the EU, roadlok-official.eu connects you with a ROADLOK dealer who can ship to you within the EU, with no import charges.

Email support@roadlok.com with the lock model, your bike's make, model and year, and a photo of the front caliper taken from beside the bike.