New-Old-Stock Shimano SuperGlide (First Generation) Chainring...53T and 130 mm BCD 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. | |
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Product Description:
This offering is for a new-old-stock Shimano SuperGlide (SG) round chainring. It's a 53T aluminum alloy model from the early 90's and has a bolt-circle diameter (BCD) of 130 mm. This model also includes a chain guard pin to help prevent an overshifted chain from lodging itself between the backside of the crankarm and this chainring. Shimano made better quality chainrings during this era, but through shop catalog research we confirmed these are Shimano 105 equivalent rings...so still a good quality offering with a number of Shimano double crankset applications. 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. Please note the close-up picture to the left indicates the chainring is narrow chain compatible, but this can be misleading when considering today's market where current stock drivetrains include 9/10-speed cassettes. As discussed in more detail below, this reference indicates the narrower chain requirement of an early 90's 7-speed drivetrain relative to older 5/6-speed drivetrains. Most of today's narrower chains should still shift fine on this chainring, but slightly wider chains (7/8-speed chains) would be preferred when matched on 7/8-speed drivetrains. We have also noted the width of these rings appears slightly thinner at it's mounting points relative to predecessor models. Our best guess is this slightly thinner design is to bring the rings closer together (when mounted) to better accomodate the narrower chain required for a 7-speed cassette/drivetrain (relative to the older 5/6-speed drivetrains). Please understand, this observation is focused primarily on the entire ring design and not necessarily the teeth...as the teeth on this chainring 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 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 7 or 8-speed drivetrain, 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 fairly nice condition (with some light shopwear, but no signs of wear on any of the teeth). General notes regarding SuperGlide (SG) design/techologies... 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... Note to international customers regarding customs... |