New-Old-Stock Shimano 600EX "Cup-n-Cone" Bottom Bracket...68x116mm

Description

New-Old-Stock (NOS) Shimano 600EX "Cup-n-Cone" Bottom Bracket...68x116 mm
Thank you for your interest in this item and please visit our store for other offerings. We have very reasonable shipping terms and combine orders to save money (for customers) on shipping costs. We also maintain customer friendly return/refund/exchange policies.
Product Description:
This offering is for a new-old-stock (nos) Shimano 600EX "cup-n-cone" bottom bracket...model BB-6207. Some of it's specifications include the following:
Cup type/size:
English threaded...1.37" cups x 24 threads per inch (tpi)
Shell width:
68 mm
Spindle/axle type:
JIS square-tapered with 3L markings
Spindle/axle length:
116 mm
Production locale:
Made in Japan
Special note:
The spindle/axle has symmetrical measurements, as both the right and left side spindle ends (including the width of the cone) measure 32 mm and the center section measures 52 mm.
Please note the spindle/axle length is fairly important, because Shimano cranksets (and other brands) generally have different profiles. This is key, because it's the combination of the bottom bracket spindle length and the right-side crank arm profile that will have the greatest impact on chainline. There is not as much information on these older style cup-n-cone bottom brackets, but we believe Shimano's chainline recommendations (for their cup-n-cone bottom brackets) should be consistent with their newer cartridge bottom bracket offerings. Assuming this fact, a chainline of 43.5 mm (measured from the center of the seat tube to the midpoint between the two chainrings on a double crankset) or a chainline of 45.0 mm (measured from the center of the seat tube to the middle chainring on a triple crankset) is considered optimal for a road bike. Alternatively, a chainline of 47.5 mm (measured from the center of the seat tube to the middle chainring on a triple crankset) is considered optimal for a mountain bike. The only other consideration here is that Shimano also specifies that a 50.0 mm chainline may be preferred for a mountain bike when the front derailleur is mounted on an oversized seat tube...pushing the front derailleur further to the right.
Given these parameters, there are probably a number of cranksets that may be compatible with this bottom bracket...although our research indicates that Shimano's 600EX crankset from the mid 80's (double chainring model FC-6207) is compatible and the intended match to this bottom bracket. This is not a surprise to us, as Shimano's 600EX groupset from this period was very good quality...and second only to Dura-Ace in the Shimano pecking order. To this point, when we compare these bottom bracket component pieces to some of our other cup-n-cone offerings, these appear superior. More specifically, the finish work, especially as it relates to the races, appears to be better...which should improve performance and possibly longevity. We also believe the materials used to manufacture these higher-end cup-n-cone offerings have more favorable strength/stiffness characteristics relative to less expensive cup-n-cone offerings, but we do not have any information to confirm our thoughts...just some limited experience and feedback from colleagues.
Also (and as noted above), the square-tapered spindle ends are compatible with other Shimano cranksets, but please check your crankset's spindle/axle length requirements before attempting to use this offering with another Shimano crankset...and we can try to help in this regard should you have questions). We empasize this last point, because chainline has a direct impact on shifting performance, so even though selected Shimano crank arms may have the same square-tapered interface, if their spindle/axle length requirements are different from this offering, then there is a strong possibility that shifting performance will suffer...so please pay particular attention to spindle lengths when it comes to purchasing any bottom bracket.
As for condition, these sets were bulk packed...spindles in one box, cups in another, etc., etc., but they've been preserved fairly well...as the races all look good and there is absolutely no corrosion or rust present on any of the component pieces. Cosmetically, you may find some scratches or scuffs, but functionally they are as new.
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Note to international customers regarding shipping...
We apologize to those that feel some of our international shipping charges are too high. We only charge actual shipping rates, but once an order exceeds a certain amount, we hesitate to use the least expensive US Postal Services First Class International service. We feel this way, because this service is not trackable or insurable...so more risk of loss. We prefer the US Postal Services Priority Mail International service for more expensive orders, because this service is trackable at USPS.com and insurable...so less risk of loss. Unfortunately, this service is more expensive, especially for smaller/lighter packages, relative to the First Class International service. We are sorry about these higher shipping costs, but hopefully our notes help to explain why this is the case.
Note to international customers regarding customs...
We also apologize to those that feel their country import taxes, duties and brokerage fees are excessive. As a small US business, we are required by customs' laws to declare each order as a retail sale. Additionally, the declared order value must be equal to total store purchases and/or winning auction bids (less any shipping costs, as these are not considered in the declared value). As a result, each customer will be responsible for paying his/her own country taxes, duties and brokerage fees, which will be collected upon delivery. Again, we apologize for these additional costs, but we cannot afford the penalties and fines that come with breaking customs' laws...so we have to strictly abide by them.