The Redline Vintage Techmatic Sealed Bottom Bracket Set installs in American Bottom Bracket shells (80s-era sizing). Each individual component is machined to era-original specifications. The set uses identical Japanese IJK sealed airframe bearings to those used in the original assembly in the early 1980s. When we sourced the bearings, IJK had to resurrect its production system. These bearings are no longer “in-line” items. Simply put, we brought this bearing back out of the IJK archives; such is the importance of authenticity. Many regard this as the most iconic and advanced BMX Bottom Bracket System of the 1980s. The Techmatic system is perfectly suited for installation with your vintage or reissue Redline 401 Series Flight Cranks.
The Redline Vintage Techmatic Sealed Bottom Bracket Set installs in American Bottom Bracket shells (80s-era sizing). Each individual component is machined to era-original specifications. The set uses identical Japanese IJK sealed airframe bearings to those used in the original assembly in the early 1980s. When we sourced the bearings, IJK had to resurrect its production system. These bearings are no longer “in-line” items. Simply put, we brought this bearing back out of the IJK archives; such is the importance of authenticity. Many regard this as the most iconic and advanced BMX Bottom Bracket System of the 1980s. The Techmatic system is perfectly suited for installation with your vintage or reissue Redline 401 Series Flight Cranks.
