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I feel like there ought to be something about dropouts on derailleur bikes, but don't know enough myself. Style of Shifter (friction shifter, brifter, grip shifter). One generally only saw handlebar shifters on really cheap bikes. Note that bicycles.stackexchange does not do valuations of bicycles. For example, a Brompton uses YYMMXXX as their serial code, so a 9s, 10s, 11s, and 12s hubs: as I recall, a Campagnolo hub originally made for 9s cassettes can also fit 10s, 11s, and 12s cassettes, and vice versa. I believe 9s freehubs are also compatible with 10s cassettes. To learn more, see our tips on writing great answers. A      B      C      D      E      F     G     H     I         J       K      L, Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sept   Oct   Nov  Dec, SHIPPING DELAYS DUE TO COVID19 - Read More. If a bicycle has indexed shifters, then it is model year 1985 or later -- assuming that the shifters and derailleurs haven't been replaced.

old catalogues, fan websites), Cottered cranks vs square tapered or splined cranks and bottom brackets, Quick releases versus contemporary through-axles, How the steerer attaches to the fork (quill vs. threadless), Braking system (especially with mountain bikes: v-brake, direct pull, etc. This reverted to the old spline pattern, but had a slightly wider freehub. SRAM introduced the XD and XDR drivers in 2015. However, many bicycle manufacturers don't use date codes and so you can't easily decode their serial numbers. In fact look closely at many Mongoose and GT BMX’s from the around 2000 to 2010 and you’ll see many similarities in frame design and geometry. Shimano road freehubs for 9/10 speeds were likely manufactured in the early 2010s. This will only really work for a major brand that has a bit of a following, as it relies on someone uploading the catalogues. For example, a Brompton uses YYMMXXX as their serial code, so a Brompton with a serial number of 1306123456 was manufactured in 2013.06 or June 2013 ), Shifting ramps and pins on cassettes/sprockets and chainrings (versus flat sprockets), Frame material (e.g., shift from tubular steel to use of CF and hydroformed aluminium). If you receive a positive result, please contact your local police to confirm the information and ask for assistance. I am looking at a bike the serial number is 070 4130 cr-mo Knowing the component group's model number or identifier (e.g. 10s freehubs cannot fit most 11s cassettes (note: they can fit MTB cassettes and HG700 or HG800 cassettes), and will be advertised as being specific to 10s. O is the year (2005), I is the month (Sept). Bicycles (except children's bicycles) are almost always required to have a frame or serial number.

Why not just edit it into this answer or a community wiki answer? At times, they needed to change the freehub body and/or free hub spline pattern to accommodate things. Mid-school Mongoose BMX bikes built through most of the 90’s have a serial number that begins with 4 letters. It seems to hold up and here it is. This applies only if decals are original or have been replaced with the identical design. Frame tubing type (e.g. However, a cottered crank is generally a good sign your bike is pre-1980.

Promotions, new products and sales. Thus, a micro spline freehub on an MTB wheel means it was made at least in 2019. 11s freehubs: In 2012, Shimano released its 11s Dura Ace group.

I'm trying to find some objective sources for the statements. When searching for a serial number, use our serial search bar - it's the second bar on our search form. You'll find all the original catalogue info you need including original parts lists, specs, colours and photos of restored bikes. Raleigh, for example, introduced square tapers on some models in 1973 and phased cotters out on all their models around 1978. Thanks for contributing an answer to Bicycles Stack Exchange! Thus, I don't believe that after 9 speeds, merely knowing the number of speeds is that helpful in dating a Campagnolo freehub. At the time of writing in 2019, DT Swiss, i9, and White Industries have either licensed the micro spline design or come up with a workaround. Frame/Fork Braze-ons. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. B is the year (1992), H is the month (Aug). Serial Numbers Chicago built Schwinn Serial Numbers for the years 1960 - 1969 are found on the left rear axle-hanger or fork-end on the frame; for the years 1970 - 1979 (Chicago built) they are on the headtube of the frame where the fork enters from the bottom (actually, this begins in April of 1970). By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Could grow too long and cluttered an answer if it was all in this one. SRAM is a relatively new entrant to road bikes. This would have started with Record, their then-top groupset, and then trickled down. GT serial numbers are usually found stamped on the bottom of the bottom bracket of your BMX. The headtube; The rear dropout; Underneath the bottom bracket shell; Note: The serial number will always be found on the actual frame of the bike. Why sister [nouns] and not brother [nouns]? What are all fantastic creatures on The Nile mosaic of Palestrina? This is the case with the 2003 Mongoose Brawler 24 below. As shown at the Branford Bike site, the 9s hub may have had a slightly different spline pattern from subsequent hubs. Karen, thanks. The 4th letter corresponds to the year of manufacture and follows on from the mid-school serial numbers. A previous owner could have replaced or upgraded components on a bicycle, so this guide only applies to original equipment. The next letter relates to the month (E) is May based on the convention January (A), February (B), March (C), April (D), May (E), June (F), July (G), August (H), September (I), October (J), November (K), December (L). Then upload a photo of your bike and the serial number. After buying and restoring a number of older mid-school and new school GT BMX bikes I also need to to figure out how to crack the GT serial numbers to get the same build date information. Serial Numbers on the left rear axle hanger and began with an 'S', followed by the standard letter/number …

HFGB00000 – 4 letters, GB are the dates. I'll note that it's sometimes difficult to distinguish between freewheel and freehub without disassembling the hub. Freehubs can be splined for Shimano or Campagnolo cogs, or they can accept a SRAM XD or XDR driver. *Decals: style/design, amount, placement, color, etc. etc. Sometimes, Campagnolo users will use the number of speeds as a reference to the model year. I suspect most sellers would describe the freehubs as compatible with 9-12s cogs. These tend to have modern rims and brakes as a giveaway.

By using this search, I understand that access to the website is granted to a user on the condition that the user shall absolve and save harmless, the Royal Canadian Mounted Police or any individual employee thereof from any damages, however caused or arising from unintentional errors, failures, disclosure or use of such information. GT pro series , i am totally confused on how to read this. Any idea on how to reduce or merge them like ubuntu 16? How to get back a backpack lost on train or airport? This answer focuses only on the number of speeds in the freehub. Or is that something better left to google ? Stem shifters were common on bikes in the 70s, but downtube took over in the 80s. Please enter the bicycle serial number using only letters and numbers without spaces or other special characters. It should be noted that the presence/absence of reflectors is a poor indicator of age. If you want to know more about the GT BMX you have, visit our BMX Catalogue website.

Please note: The GT serial number will give you the build date of your GT BMX. The derailleur actuation ratio changes between these so they are not compatible, but the hub may be the same. Low-end manufacturers may continue using technology that is severely outdated (such as one-piece cranks, freewheels, or quill stems) because it is cheaper to do so. The first thing everyone wants to know when the buy a second hand GT BMX is ‘how old is it?’ Reading the GT serial number and finding out the build date is an important part of any BMX restoration. This is not always the case and there will be some bikes that do not fit into this formula. Searching for a brand and plausible year with "catalogue" can often turn up sites dedicated to scans of that brand's literature; you may need to check more than one such site for good coverage.