Sunline have been making off-road motorcycle parts for the American market since the 1970s, and are experts in producing durable components to withstand the particular vigours of riding at speed in the dirt and mud.

Their staple 'Logo' handlebar grip is available as a lock-on grip for mountain bikes, and comes in two sizes, think or thin.
The internal diameter and flange size is the same for each version, but the thick ones use more material, making them thicker and giving a softer, more comfort-biased feel, ideal for leisure riders and especially suited to those who don't always want to wear gloves to ride.
The Thin version of the Logo grips uses less material for a greater feeling of responsive control. These are preferred for race situations, and generally whenever gloves are worn and major cushioning is not required from the grips.