Established in 1992, Sumai Bicycle Co.,Ltd. is one of the biggest China bicycle parts manufacturer and wholesaler. We've gotten the WMI (World Manufacturer Identification) since 2005. Our company has perfect quality management systems with ISO9001 international quality authentication in 2002 and pays great attention to new product development. We have high-quality staff at design, oem bicycle parts development and production fields, and have introduced in qualified personnel from foreign bicycle enterprise. Most of our products have been approved with CE certificate, and some approved with EEC, EPA and CARB.

The Stronglight 650 is a "dual adjustable cup with fixed length spindle" B/B that permits the spindle, exposed on the crank side, to be adjusted very precisely, allowing crankset/chainline adjustments to be perfect.
The 650 uses machined bearing cups made of aluminum rod. Each cup has four small, round dimples in the side for a peg spanner to make small, fine adjustments. The interior of the hole where the spindle exits the bearing cup has been milled with a groove for an O-ring to seal the system, but the needed O-ring has been omitted. A machined aluminum lockring on the left bearing cup holds the system firmly and fixed in the B/B shell. Into the bearing cups, a precision sealed bearing cartridge fits from the inner side. The French made SKF 61903 RS1 is used.
The 650 has a Titanium spindle machined from Ti 6Al-4V rod, that the bearings are machine pressed snugly onto. At the time the bearings are pressed onto the spindle a tight fitting water sleeve is inserted between them. Because the bearings aren't pressed onto the spindle easily, field replacement isn't an option. It will take a partially closed bench vise to support the inner side of the bearing and the firm rap of a hammer, on the top of the spindle, to free it. The spindle is drilled through to reduce weight with the interior ends tapped for the steel crank bolts and washers included with the 650. There is an opaque, clear-colored plastic moisture sleeve to keep dirt and moisture from penetrating the B/B assembly.
The Stronglight 650 is available in English thread only, with a 114mm, 118mm, 124mm or 127mm spindle. The weight of the 650 with a 124mm spindle (with crank bolts and sleeve, which weigh 31 grams) is 217 grams. Made in France, the cups are Silver, lockrings are Black.

The Avid Tri-Dangle is cleverly machined cable carrier. There is some controversy about the similarity between the Tri-Dangle and the Joe's Yoke in terms of which came first. We are reasonably convinced that the Tri-Dangle was the first. Machined from plate aluminum, the Tri-Dangle is 24mm high and 34mm wide. The middle of the Tri-Dangle is milled away leaving a light weight piece with thin walls. Two cuts are made on the sides. The 2.5mm kerf left from these side cuts allow the straddle wire through.
Notice: there is no room for a lead anchor to pass through, so the straddle wire your brake uses must use a cable end clamp for at least one end (Avid, Critical, Grafton, Joe's, Paul or Piranha) or bolt down the cable to the right arm (Crystal Design, Dia-Compe, Ritchey, Suntour, or TNT).
A small hole is drilled from the top, through the upper area for the brake inner wire to pass through. Four holes are bored into the Tri-Dangle from the front face, then tapped with threads. There are two at the top, and one at each side. Each of these holes has a cup point set screw. The two screws at the top when tightened hold the brake inner wire securely. Those at the side grip and hole the straddle cable stationary. The Tri-Dangle weighs just 4.5 grams and comes anodized in Blue, Black, Lavender, Red, or Silver. The needed 2mm hex wrench to tighten the set screws is included. Made in USA.

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