NOS Shimano Dura-Ace Bottom Bracket Spindle (Early Version)…68 mm x 107 mm

NOS Shimano Dura-Ace Bottom Bracket Spindle (Early Version)...68 mm x 107 mm

$129.99 Buy It Now or Best Offer
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Location: Argonia, Kansas, United States
Ships to: US,
Item: 394813667278

Condition:New other (see details): An item in excellent, new condition with no wear. The item may be missing … Read moreabout the conditionNew other (see details): An item in excellent, new condition with no wear. The item may be missing the original packaging or protective wrapping, or may be in the original packaging but not sealed. The item includes original accessories. The item may be a factory second. See the seller’s listing for full details and description. See all condition definitionsopens in a new window or tab
Shimano:Shimano
Part Type:Bottom Bracket Spindle
Bottom Bracket Shell Type:BSA (English)
Compatible Bike Type:Road Bike
Type:English
Shell Width:68 mm
Dura-Ace:Dura-Ace
MPN:Does Not Apply
Item Length:107 mm
Country/Region of Manufacture:Japan
Spindle Interface Type:Square Taper JIS
UPC:Does not apply

eBay New-Old-Stock Shimano Dura-Ace Bottom Bracket Spindle (Early Version)…68mm x 112mm 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: Listing Update…This is not so much an update as it is a point of emphasis concerning the specs on this particular bottom bracket spindle. We’ve taken the measurements a handful of times and keep coming up with the same dimensions for the center section. More specifically, we measure 56 mm for the center section when the typical center section on cup-n-cone bottom bracket spec’d to a 68 mm shell width will be 52 mm. I don’t fully understand why Shimano spec’d this 40 year old bottom bracket with the longer center section…other than to assume the matching cups must’ve have been thinner walled (possibly to save on weight). So the complete unit should still properly seat in a frame’s bottom bracket shell spec’d to the 68 mm standard (as long as thinner walled cups are used). I’ve also been told some vintage Campagnolo bottom brackets were spec’d to similar standards…with the longer spindle center section that effectively pushed the bearings out closer to the the end/edge of the shell (and thus requiring bottom bracket cups machined/spec’d with thinner walls). One other thought here is we’ve receive a few requests for bottom bracket spindles spec’d to an old Raleigh standard and we’ve been told this standard requires English threaded cups with the standard 1.37″ diameter…but the spindle has proprietary dimensions (and is therefore extremely difficult to source). It’s our understanding this proprietary Raleigh bottom bracket spindle requires a longer center section that is possibly similar to what we have with these vintage Dura-Ace spindles. I do not know the exact Raleigh spindle requirements, but those that do and are in need of one…may want to have a look at this bottom bracket spindle as one possible option. Original Listing… This offering is for a new-old-stock (and NJS certified) Shimano Dura-Ace ”cup-n-cone” bottom bracket spindle from the early 80’s (so a very early drivetrain component). Some of it’s specifications include the following: Cup type/size: compatible with cups having English threads and measuring 1.37″ in diameter x 24 threads per inch (tpi) Shell width: 68 mm Spindle/axle type: JIS square-tapered Spindle/axle length: 107 mm Production locale: Made in Japan Special note: The spindle/axle has symmetrical measurements, as the right side spindle end (including the width of the cone) measure 25.5 mm, the left side measures 25.5 mm and the center section measures 56 mm. Please note the spindle/axle length is fairly important, because cranksets 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 should offer a good bench mark. 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 spindle. Although, our research indicates Shimano’s Dura-Ace track crankset (Model FC-7100) and road double crankset (Model FC-7200) from the early 80’s is compatible and the intended match to this bottom bracket spindle. This is not a surprise to us, as the Dura-Ace groupset from this period was top-end quality. To this point, when we compare this bottom bracket spindle to some of our other cup-n-cone spindles we have available, this offering appears 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 spindles 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 cranksets, but please check your crankset’s spindle/axle length requirements before attempting to use this offering with another crankset…and we can try to help in this regard should you have questions). We emphasize this last point, because chainline has a direct impact on shifting performance, so even though selected 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 (or related component pieces). As for condition, these spindles were bulk packed, 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. Terms and Conditions: You may visit our store by clicking on this ”Store Home Page” link and please note the product categories on the left side of our ”Store Home Page”. We have also moved our ”Terms and Conditions” to a separate page within our Ebay store. You may navigate to this page by clicking on the link on the left side of our ”Store Home Page” (below the product categories) or you may click on one of our ”Terms and Conditions” direct links herein. 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.

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