J Jockey Wheels - The two small wheels which guide the chain in the rear derailleur. K Knobblies - Aggressive tires for true off road use. L Lacing - The process or type of spoking pattern used on wheels. Lube - Anything from oil to heavy duty grease. Dry lubes evaporate leaving a dry film.
Wet lubes remain wet to the touch and protect better in wet conditions.
Dry lubes are good for dusty conditons because they don't pick up dirt. N Nipple - Small brass or alloy threaded adjuster that fixes the spokes to the rim. Nylock - A nut with a nylon insert which the bolt thread cuts into, designed to stop the nut from working loose. P Presta - The thin valve, used more commonly on racing bikes, and choice for some offroad riders. R Rapidfire - A type of shifter, made by Shimano, which operates with two levers, either moving the chain to a larger or smaller cog.