Aemmer

Otto comes to mind. Or even CCProto.

mountaindave 

Somehow the pictures didn’t upload. Let’s try again:

rustystrings61 

The previous owner of this 1992 Trek 820 abandoned it at the (now defunct) LBS when he got a quote for a drivetrain and brakes. The LBS’s owner said to me, “It’s yours if you want it - otherwise I’ll scrap it.”

So it started like this -




The cranks were trashed, no brakes, bad bullhorns, rusted chain, etc.

I fished some bits out of the parts bins and puttered with it. Dissatisfied with the results I moved it to the back of the pile - until last weekend, when I started thinking about drop bars and a single speed. A quick trip to the magic gear calculator convinced me I could make it work.

I installed the bottom bracket that was part of the trove of Alivio parts generously bestowed upon me by @Madhonk. @hazetguy sold me a used stainless 36T chainring dirt cheap. I found BMX 16 and 18T cogs for $6.95 each, and used an online coupon for free shipping.

The rest of it, I had. SR cranks now kitted out with 34/36T rings, an old chain from my fixed-gear, Alivio cantilevers from a long ago parted out Bianchi Osprey, cheap pedals, ancient SR rando bars, RX-100 levers from a parts donor Bianchi Eros, recycled bar tape - even unused cables from the parts stash.

I figure the near 60-in gear will be great on vacation to our favorite beach towns. I could get some Michelin Country Rocks in 1.75 for gravel, and I can switch down to the 49-in gear for tougher country.

Foe a bike with less than $21 invested so far I am pretty pleased. It’s already delivered on the fun dept - building it made me grin the whole time.

vintagepedals

Trek 720 7speed gravel grinder!

elqsigue

Very nice!

mountaindave 

Very impressive! Did you just get lucky with those vertical dropouts? Because I don't see any chain tensioner on there, or a half-link.

rustystrings61 

I searched out the FixMeUp magic gear site and plugged in the chainstay length and cog sizes. 36x16 is perfect, 34x18 is pretty good, without tensioners, etc.

degan

I call it Frankensteins mullet. My goal was to do two things: get it under 20 lbs and make it look like the space shuttle (almost all grey/silver with bits of random color). It was 20.4 lbs before I wrapped the bars and I know I can save quite when I get a different rear wheel on there. It rides amazing and absolutely flies at speed.

Sorcerer

These bikes are great to see.

What does it feel like to put a 700c up front on a 26" framed MTB with drop bars? I suppose the only way to really know is build one and ride it.

​​​​Yellow finishing tape on blue tape is a good look.

degan

Personally I think it feels great. Responsive, but not twitchy. I can control it with no hands easily. The only thing I would worry about is figuring out the trail with a new fork. My bike was designed to have front suspension and thus room for a tall fork, so switching it from 26" suspension to 700c non suspension didn't actually change my top tube angle much. Also my fork doesn't have much offset. If someone were to just take a standard rigid frame MTB and put a early hybrid steel 700c fork with lots of trail, that thing is going to be floppy. Luckily I work at a co-op so I was able to test a bunch of different crazy setups.

George Abitbol

This is my commuter bike. 1995'sDecathlon rockrider 500, 3 tubes cromoly.




3x7 stx, shimano bar end shifters, alivio brakes, exage levers, maxxis detonator, Velo Orange stem, Idéale saddle. Most of the parts are from my stock.

av1

Sorcerer

Great. I have only put a rigid 29'er fork on a 26'er that was made for front suspension, and put another 26" wheel on (disc brake) and it felt great too.

​​​​​​Like you said, it's going to depend on a few things to make it, 700c in the front , work right. That is the ticket for a gravel set-up I'd say.