Retro Road Bike to Monster-Cross Pictures
Anyone convert an old lugged road bike into a monster crosser or something close? I've got an old road bike that will barely fit 700x28 because of the reverse drop outs. The stays, bridge,and front fork could probably handle 34's.
I'm thinking about having the bike repainted, and I may do a cyclocross conversion w/disc at the same time.
I'm completely willing to spend "new bike money" to convert this old frame due to its sentimental value.
Road bike to MonsterCross
The total issue with this type of conversion is in the original frame's design and build suitability.
What do I mean by this?
1: Forks - Road, Wall thickness = 0.6mm and about 16mm dia about 90mm up from front axle, this is the high stress point for disc brakes. Probably too thin walled to do Canti's higher up fork leg as well.
2: Frame design - road frames are typically 73* head and seat tube angles with a low BB.
CX frames are more casual at the head tube angle, with a little bit more BB height.
3: BB - 28mm tire on a lug frame max tells me that you have a short chainstay. Chainstays are straight on a lugged road bike frame, not S-bend and offer no ability to be able to be fitted. Lug frames are 22mm round at BB lug socket and BB's are at a fixed angle.
4: Overall frame tube Specification - 1" top tube, 11/8" downtube? or OS tubeset?
The above contributors are not being hard on you. The simple fact is your frame is not suitable.
If sentimentality means anything, I have a friend who is so attached to his frame, to the point that he restored it to its original period state, hangs it on his garage wall, and has a nostalgia ride on a fine sunny day - thats respect.
CX and Monstercross frames are different in key places - this is important when contemplating converting.
Have you looked at More MonsterCross elsewhere on the MTBR? plenty of real world bikes to get an idea from to be found there. Sort out what you want and get the real deal.