One other drawback of multitools with 8mm allens is you can't
torque the crank bolt enough with a multitool to properly
tighten the crank bolt. You need a regular right angle long
shank allen wrench or better a 3/8" socketed allen and torque
wrench for the BB crank fixing bolts. A lot of newer CW are
held by torx bolts. A chain tool is helpful for shortening
new chains but stick to chains with 'master links' such as
SRAM or KMC. Chain cleaning tool such as Parks is basic for
chain maintenance, a regular need for commuting. Use
simple green to clean the chain about half and half with
water-works well and is nonflammable.