Doesn't even need to have a nipple - a mate just drilled a hole and tapped it for an M3 screw; on another bike he just drilled the hole and uses a couple of turns of alu tape to cover it up. He tops up the grease once or twice a year with a mini grease gun - it has a pointy enough nozzle to make an ok seal on the hole.
Doesn't even need to have a nipple - a mate just drilled a hole and tapped it for an M3 screw; on another bike he just drilled the hole and uses a couple of turns of alu tape to cover it up. He tops up the grease once or twice a year with a mini grease gun - it has a pointy enough nozzle to make an ok seal on the hole.