Mavic 312
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Category:  Headsets
Name:  Mavic 312
Brand:  Mavic
Model:  312
Years:  1984 - 1988
Country:  France
Added By: Chombi on 05/27/14
Updated By: peterbman on 12/30/16
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Mavic 312Mavic 312
Body MaterialAluminumUpper Bearing Size22 - 3/16" (retainer)
Lower Bearing Size22 = 3/16" (retainer)Crown Race SizeISO (26.4mm)
Upper Cup Markings25.4 x 24FLower Cup Markings
Available Threading English/ISO/Italian (25.4mm x 24TPI)Stack Height 48mm
General Information
This Mavic headset is called out as a model "312" on its packaging. Seems to be identical mechanically as the model 310, having the same stainless steel bearing race inserts and the same bearing retainers...

Robert Broderick: "... the MAVIC 312 headset is actually the 1” (25.4 mm) x 24 TPI English / Italian threaded version of the MAVIC 310 whereas the MAVIC 311 headset is the 25 mm x 1 mm (25.4 TPI) French metric threaded version of the MAVIC 310. So, if one references a MAVIC 310 headset ..., they are discussing in generic terms said headset absent any specifics with respect to its threading. The MAVIC 310 headset was introduced in late 1983 for model year 1984 and is essentially a refinement of the original model 300 which first appeared back in late 1978 (...both the 300 and 310 models were available in 1984 and 1985 with the 300 being deleted commencing with model year 1986 whereas the 310 continued production until being superseded itself by the model 305 in 1989), and one which cost three times as much at retail than its predecessor. While the exterior form of both the 300 and 310 models are nearly identical, significant differences can be found internally – the former being based upon an ingenious wholly integrated design of J.P.R. origin which utilized fewer parts, loose ball bearings, and (...unfortunately) aluminum alloy races which wore out far too quickly, whereas the latter incorporated precision stainless steel bearings housed in plastic retainers along with pressed and hardened stainless steel bearing races – a combination which resulted in considerable more durability. It is my understanding that while the 300, and by extension, the 310 headset designs were “inspired” by, and may well have resulted in licensing fees being paid to, J.P.R., they were actually produced in-house by MAVIC themselves."
Quality:Rarity:
 
 
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Brand Information(click to expand)
 Mavic is best known for its lightweight aluminum rims and complete wheels, which they continue to produce today.  They also produced a full range of drive train components in the past.  Mavic made a failed attempt to popularize an electronic shifting system in the early 90's.
 
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