Listing Update...very few left in this older braze-on model front derailleur (at least as far as the 105 model front derailleurs we currently have in stock).
This is a new-old-stock (NOS) Shimano 105 front derailleur from the late 80's (model FD-1050). Some of it's more prominent design features include...
Capacity: double chainring with 14T (max) difference (shop catalog specs)
Compatibility: marketed as road bike model during the 6-speed cassette/freewheel era (although see notes that follow for other drivetrain possibilities)
Mounting bracket: braze-on...so please make sure the intended frame has the mounting bracket on the seat tube to accomodate this mouting type
Cable pull: bottom (so cable routing must enter from below the unit)
Design: conventional/bottom swing
Weight: 100 grams (per our digital postal scale)
This front derailleur is a true "old stock" item, as date coding stamped on the backside of the derailleur cage indicates a late 80's production date. This would appear to be fairly significant, as our Shimano catalogs from this period indicate the 105 groupset was marketed as a 6-speed drivetrain with 126 mm (locknut-to-locknut) spacing. As a result, the derailleur cage (or chain guide) should be wide enough to accomodate most wider chains found on vintage road bikes having standard spaced 6-speed drivetrains (126 mm rear spacing) or even standard spaced 5-speed drivetrains (120 mm rear spacing). This is critical when considering that most newer front derailleurs are designed with narrower cages to accomodate narrower chains (and please refer to the notes that follow for a more complete discussion on this topic).
In terms of condition, all of these front derailleurs are new-in-the-box...so their condition is very nice.
General note regarding narrower/wider front derailleur cages (chain guides) and chains...
We do not see many good quality braze-on front derailleurs with these slightly wider cages, which are typically more effective at shifting the wider chains desired on some vintage road bikes. Narrow chains may also be used with these vintage setups, but because they are typically more expensive and usually not as durable (because they are made with thinner/lighter component pieces)...they are probably not the best alternative for a vintage road bike. Wider chains are usually a better option, because they are made with thicker/heavier component pieces that will generally hold up better over a longer period (so more miles between replacements). The problem is that most of today's front derailleurs are built with cages to accomodate extremely narrow chains (for 9 and 10-speed shifting), which means they might not work as well on a vintage road bike when a wider chain is preferred (for the reasons noted above). In many cases, it's still possible to get the newer front derailleurs to function...but with a narrower cage and a wider chain, it would appear the limit screw adjustments have to be near perfect to eliminate chain rub (so little margin for error here...and hence the reason the slightly wider cage on these older front derailleurs is a nice feature).
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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.