The Blackrock X1 is sprung at both ends. There is a 20 inch suspension fork at the front with a mechanical lockout on it, and a coil shock at the rear, sitting in the frame just ahead of the back wheel. That is what dual suspension means: both wheels can move up over a bump instead of sending all of it straight into you.
The front fork
The front wheel meets everything first, so the fork does most of the work. Over gravel, frost heave, a curb, a root across a trail, the fork lets the wheel travel up and come back down while the handlebars stay roughly where they were. Your wrists, elbows and shoulders notice that before anything else does.
The lockout is the part worth knowing about. It is the collar on top of the fork, and turning it stops the fork moving. That is what you want on smooth pavement, or when you are standing on the pedals and pushing hard, because a fork bobbing up and down with every pedal stroke is soaking up effort that should be going into the road. Turn it back off when the surface turns rough again. It is mechanical, so there is nothing to charge and nothing to go wrong electrically.
The rear shock
The rear is a coil shock mounted in the frame. Its job is to keep the back wheel on the ground over rough sections rather than letting it skip, and a wheel that is still on the ground is a wheel that is still driving and still braking. The rest of the benefit comes up through the saddle, or rather it does not, which is the thing you notice on a long ride or a washboard gravel road.
Working with the fat tires
Four inches of tire at sensible pressure is a suspension system in its own right, and it takes care of the small, fast chatter. The fork and the shock handle the bigger, slower hits the tire cannot swallow on its own. Between them, that is why this bike is comfortable on ground where a rigid commuter would rattle your fillings loose. The tires have their own page.
Looking after it
Suspension asks for very little. Wipe the grit off the fork legs when the bike is dirty, check now and then that the shock mounting bolts are still tight, and if either end starts making a noise it was not making before, look at it rather than riding it out.
The fork and the frame are listed on the full specifications. The bike itself is on the X1 product page.
The bike this page is about
The Blackrock X1 is a 500W folding fat tire electric bike, 20 × 4.0 Kenda tires, 48V 20Ah battery, Shimano 7 speed. Every component is published, and the numbers we have not measured yet are left blank on purpose.
Features & Uses
More about the X1
Step-Thru E-Bike Frame
The frame drops low in the middle, so you step through it instead of swinging a leg over the back.
Read more →Folding E-Bike
Two hinges, one in the frame and one in the handlebar post. Folded, it fits a car trunk or an RV bay.
Read more →Throttle and 7-Speed Shimano
Pedal it through the seven Shimano gears, or twist the throttle and let the motor do the work.
Read more →20x4.0 Fat Tires
Four inches of tire on the ground, so it stays planted on gravel, sand and packed snow.
Read more →Key-Locked Removable Battery
The pack locks into the downtube and slides out on its key, so you can carry it inside to charge.
Read more →Fenders and Rear Rack
Fenders front and back keep the spray off you. The rack is stamped for 25 kg.
Read more →Digital Display Screen
Battery level, speed, distance, average speed and power draw, all on the handlebar.
Read more →