1982 Trek 412

Are you looking to repair this bike?
Links below for parts you can buy now on amazon.

Over the years we repaired thousands of these and became experts in finding alternatives to original bike parts. 
Buying parts for older bikes is confusing, as most of the original parts have been discontinued. 
We use these parts everyday and created this list to make it easier for you to repair your bike.

Shifter cables and housing: https://amzn.to/38g40ol

Brake cables and housing: https://amzn.to/2DZqPPk

Handlebar Tape: https://amzn.to/2qxHiaf

Rear Wheel: https://amzn.to/2RuAB3X

Front Wheel: https://amzn.to/2PuFaIM

Tires (good): https://amzn.to/2s9eipE (similar look, casual use, choose 27x1 1/4)

Tires (better): https://amzn.to/33YwOyl (super flat resistant and fast rolling, choose 27x1.25 or 27 1 1/4)

Shifters: Front and rear (right and left): https://amzn.to/347vWrv

Rear Derailleur (good): https://amzn.to/2DYUOXF (choose w/ direct attachment)

Rear Derailleur (Better): https://amzn.to/2PupyVA (choose GS type)

Front Derailleur (good): https://amzn.to/3415IXm (choose double)

Front derailleur (better): https://amzn.to/2LAI262 (better quality, fit and finish)

Bottom Bracket: https://amzn.to/2RydlSI (Likely 68x122.5 but must measure spindle length before purchase)

Crank (good): https://amzn.to/2Yw7miQ (better quality fit and finish, will likely need a new bottom bracket)

Crank (better): https://amzn.to/2rg0YQx (lesser quality option, likely will not need a bottom bracket)

Freewheel: https://amzn.to/2qx4c1t

Headset: https://amzn.to/38EkfvQ (Choose 27.0 but it's better to remove crown race and measure inside diameter for sure)
Pedals: https://amzn.to/3593fvC (Modern style)

Pedals: https://amzn.to/2DZbNZP (same style as original)

Chain: https://amzn.to/38ayVCI (fits 5, 6, 7 and 8 speeds)

Brake pads (good): https://amzn.to/36eEldP (casual use)

Brake pads (better): https://amzn.to/38ixNN7 (Improved performance and wet/cold condition)

Brakes (rear): https://amzn.to/2P31N8o

Brakes (front): https://amzn.to/2Prqcn2

Brake Levers: https://amzn.to/2LQALz9 (similar to original

Brake Levers: https://amzn.to/356h3Hc (modern style)
1982 Trek 412 we refurbished here at Bike Boom. If your'e not familiar, Bike Boom is a used bike shop in Davis square, on the border of Cambridge and Somerville , near Boston MA. where we specialize in restoring and refurbishing used and vintage bikes and offer professional bicycle repair services.

this 1982 trek 412 was acquired with a bent rear wheel and no seat tube decals. Apart from that the trek was in excellent condition. I think the fear derailer is not correct (suntour ARX instead of suntour vx-s) and tires were more recent and still supple. We replaced the torn seat and tape, installed new reproduction cane creek hoods instead of the cracked dia come ones (dia compe changed their name in 1996), great product which has only become available recently and compliments every restoration. A new alloy rear wheel was installed instead of the bent rigida rim which was beyond repair. We see this all the time, a great bike with a bent rear wheel which probably was too expensive to replace and the owner decided to retire the bike, a few years later he decides to sell, understanding he would probably never repair or ride it again. It's relatively hard to distinguish the Early trek models made until 1984 as trek did not include a decal for the model number and basically all trek bikes look the same apart from the frame color and the background of down tube decal. I used Vintage-trek.com to locate and analyse the serial number which showed me it's an 1982 and compared the parts and frame tubing material sticker ( ishiwata double butted chrome molibdenum ) to come to a conclusion that it was an entry level 412. according to vintage-trek:  Beginning in 1981 or 1982 (and extending through at least 1986), Trek used a subcontractor in Japan to build some frames and parts of frames. The 300 and some 400 series were a complete (unpainted) frame and fork from Japan, but painted and assembled in Waterloo. 

the 1982 trek 412 was sold a few days ago to a nice guy who had  a 10 speed which was given to him and was in poor condition it was also too small for him. he traded it and was completely thrilled with his new ride, can't blame him for getting excited, it really is a great bike.

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