The 1999 Diamond Back Reactor JR BMX features a lightweight 6061 alloy frame with a threaded bottom bracket and gusseted head tube, paired with a full chromoly 1” threadless fork using 1” blades. It comes fitted with alloy handlebars offering a 5” rise, held by an alloy four-bolt A-head stem. Braking is handled by an alloy caliper brake with Tektro alloy lever, while the drivetrain uses a forged alloy 165mm crankset with a 43-tooth alloy chainwheel, matched to alloy pedals. The wheelset consists of Alex double-wall alloy 32-hole rims, alloy precision sealed-bearing hubs with chromoly hollow flip-flop rear axle, and stainless spokes, wrapped in Tioga Comp III 20x1-3/8” tyres. Comfort comes via a one-piece seat with integrated alloy post.
Alloy Frame
3pc Alloy Cranks
Alex Alloy Rims
To use the BMX SerialFinder start typing the whole serial into the search bar at the top of the page, or use the Advanced Search page. Based on your entry, a filtered list of possible bikes that match your serial year and month will appear.
Diamond Back BMX serial numbers.
The first three characters ACK is the factory code.
After the above factory code, the next character is year of production. 8 = 1998, 9 = 1999. Production would have most likely started around May 1998 through to April 1999.
After the year is month of production. A = January, B = Febuary, C = March, D = April, E = May, F = June, G = July, H= August, I = September, J = October, K = November, L = December
Example: ACK8H00000
Made in Taiwan.
As a general rule, bikes made in Taiwan had around a 8 - 9 month production lead timeline before they were delivered and sold in bike shops around the world. Generally around May of each year, factories would switch production to making models for the following year.
