New-Old-Stock Shimano 600EX Biopace Chainring…52T w/130mm BCD
Specifications
| Return Shipping Will Be Paid By | Seller |
| All Returns Accepted | Returns Accepted |
| Item Must Be Returned Within | 30 Days |
| Country/Region Of Manufacture | Japan |
| Color | Brown |
| Part Type | Chainring |
| MPN | Does Not Apply |
| Distance Between Bolt Holes | 130 mm |
| Brand | Shimano |
| Number Of Teeth | 52t |
New-Old-Stock Shimano 600EX Biopace Chainring...52T w/130mm BCD (Best Quality Oval-Style Ring We Have Available) 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 Shimano 600EX Biopace (oval-shaped) 52T chainring with a chain guard pin (to help prevent an overshifted chain from lodging itself between the backside of the crankarm and this chainring). It's finished in a an anodized brownish gray color that has been subject to some debate. More specifically, we've received a few customer comments regarding this color...with some believing the color is brown, while others believe the color is not a true brown and shows a hint of gray under certain light. I guess in the end, we'll stick with the brownish gray reference...with the emphasis on the brown color more than the gray color. These 80's vintage aluminum alloy 600EX chainrings are easily the best quality oval-style chainrings we have available, as the beveling/shape of their teeth appears more precise relative to lower quality Shimano chainrings from this same era. We are not entirely sure how much benefit this will provide while "on the road," but it's clear Shimano took more time and care in manufacturing these chainrings relative to some of their lower level chainring offerings. As for other specifications, it's worth noting the common 130 mm BCD measurement makes them a good candidate for a number of Shimano double cranksets. Additionally, Shimano spec'd a number of their road triple cranksets with the same BCD measurement for the middle ring and outer (largest) ring, which provides other compatible options for this offering. Although, please do not consider these rings for a Shimano mountain bike triple cranksets, as they generally have a smaller BCD measurement. Additionally, we have noted the width of these older rings is slightly thicker at the mounting points relative to some 90's model and later chainrings. Our best guess is the slightly thicker design was intentional and allowed for a wide enough gap between the rings (when mounted) to accomodate the thicker chains typically used on 5/6-speed drivetrains from this era. Please understand, this observation is focused primarily on the entire ring design and not necessarily the teeth...as the teeth on these chainrings are compatible with the relatively standard 1/2" x 3/32" chain. We also believe these chainrings may be used on any number of drivetrains (5, 6, 7, 8 and possibly even 9-speed drivetrains) with a compatible chain...meaning a chain with an appropriate external width for the intended drivetrain. If we had to make a recommendation, we would probably lean towards a 5 and 6-speed drivetrain first, but there is some flexibility here...as alluded to above. With respect to condition, they are new and unused...and although bulk-packed...they are still in nice condition (with no signs of wear on any of the teeth). General notes regarding Shimano chainrings that pre-date SuperGlide (SG) design/techologies... As noted above, these are 80's vintage chainrings...so they pre-date Shimano's SuperGlide chainring technology (introduced in the early 90's). The teeth on these rings are still beveled to facilitate shifting, but they do not include the subtle profile design differences noted on the SuperGlide chainring models. As we note in our SuperGlide chainring listings, we are not entirely sure to what degree these subtle tooth profile differences impact shifting performance, but we still want to be clear these rings do not incorporate the SuperGlide design changes. As a result, these rings will have a much more uniform (and traditional) tooth profile/design. So while we believe these rings to be better quality (and probably longer wearing) relative to some of our lower level SuperGlide chainring offerings, they do not incorporate some of Shimano's computer aided advancements in tooth profile design from the 90's. 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.