• Made in Germany by SKF, the world leader in bearing technology.
• Roller bearings on drive side for higher load rating.
• Extra-large ball bearings on non-drive side rolls directly on spindle and in shell.
• Easy installation.
• Patented seals keep contamination out.
• All parts from stainless steel and aluminum to prevent corrosion.
• Warranty: 10 years/100,000 km (65,000 miles), whichever comes first. (Valid for original customer only. Excludes abuse and improper installation.)
• Warranty includes bearings!
Most modern cartridge bottom brackets, even the most expensive models, are relatively simple designs with exposed bearings that are separated from the elements only by rubber dust shields. These dust shields are not designed to keep out water. The bearings usually are standard cartridge bearings with relatively small balls. As a result, many high-end bottom brackets require frequent bearing replacements when ridden year-round. (Only SKF gives a warranty on their bearings.)
SKF designed their cartridge bottom bracket from the ground up to optimize strength and durability. The bearings run directly on races ground into the spindle and the shell, so SKF can use larger balls and rollers, resulting in a much higher load rating and greater durability. For example, the non-drive-side balls measure 4.5 mm in diameter, whereas the standard cartridge bearings (61903) used in most high-end cartridge bottom brackets use much smaller 2.8 mm balls. Smaller balls wear faster and even can break under high loads.
To keep the bearings running smoothly, SKF designed and patented multi-stage seals that retain the grease and keep out water and dirt. All parts, including the bearings, are made from corrosion-free stainless steel and aluminum.
SKF bottom brackets are available for square taper (ISO and JIS) and ISIS cranks, for BSC and Italian bottom bracket shells.
Most ISIS bottom brackets have a short lifespan, because the larger spindle requires the use of undersize bearings. The SKF bottom bracket uses the same large bearings on all models, making this the most durable ISIS bottom bracket available.
Installation is simple, and requires only an ISIS-type bottom bracket tool (for example, Park BBT-18). Do not use a "single-hook" bottom bracket wrench, as it can crack the hardened stainless steel of the BB shell. We sell the tool at cost
• JIS taper, BSC or ITAL threading, spindle lengths: 107, 110, 113, 116, 121, 126 mm (symmetric spindle)
• ISO taper (Campagnolo), BSC or ITAL threading, spindle length: 111 mm (symmetric spindle)
