Picture of A Modified Raleigh Twenty Designe

Here we have a modified (Improved Design) this is more suited to the larger person, Longer Arms and Longer legs than a child. Not with excessive weight I would rate this as being suitable up to 100 kilo

After all it is still basically a child's bike, Now getting down to basics or modifications to the original Raleigh Twenty design:

Brakes originally had canter lever type which I personally never had any problem with, but a lot of people seem to find them inferior to V brakes.

Head Post steering changed to incorporate front suspension, and a longer raised handlebar

Top Tube lengthened for extra knee clearance from handlebar

this also gives more clearance from pedal to front wheel

Gears 3 speed improved to 6 speed with a derailleur changer  

This gives a basic Idea of the possibilities and Improvements that can be made.

The Raleigh Twenty Bicycle item1

Was one of the greatest bicycle designs ever developed, That is the H frame design whether they are fixed top tube or folding top tube, the U frame was a different thing all together but non the less it should rank in second place. Getting back to the Raleigh Twenty which are in great demand even today. The basic bicycle is or was a child's bicycle. So even though Adults still ride them (with usually quite a few modifications)
Some of the mods Include raising the seat on a longer seat post and also raising the handle bar to suit the Adult rider who most often has longer arms and longer legs.
TBC... In item 2

Testing Time

So he said to me ? How do you test time, My answer had to be subtle and not quite obvious that I didn't have a clue at this point in time.
Well I said to him by way of a reply, do you have the present time on your watch?
Yes he replied I do. And would you like me to tell you the time now.
Oh yes was my quick reply, I didn't want this opportunity to vanish.
Well it is exactly! Stop I shouted, Lets just assume that I have just tested time?
TBC...

Extension

I didn't like the original handle bar extension I made so I have made a new one, Looks a lot better

Three Piece Crank

I removed the single gear crank which was a 44 tooth one with 145 mm crank arms.
I believe the original Raleigh one was a 43 tooth on the Twenty.
Anyway I have used a Shimano Deore FC-MT60 with 175 mm Crank arms
Funnily enough this I took off a Aluminum Frame Raleigh Road bike, the gears on this triple are
48_38_28 which I feel gives a pretty good all round drive train.

Fitted a luggage rack and bell also fitted reflectors.But still needs hand grips on the handlebar, these will be fitted when I finish the painting,  

My New Modified Twenty

Yes Its a Modified Twenty, Anyone that has owned or ridden a Raleigh Twenty will quickly realise that it is not the greatest ride, that is until it has been modified in some way. The basic H frame design is in my opinion one of the greatest bicycle designs, OK may not be the strongest or the safest but still a pleasure to ride,the caliper brakes leave a lot to be desired when it comes to stopping, especially in the wet.And yes there are quite a few other things that many people modify to improve a great little bike. Not forgetting the fact that these little bikes are basically a Child's bicycle, 20 Inch wheels with three speed hubs, low seat, low handlebars, all these things need to be modified for Adults, This is where the fun begins has most of these bicycles are used and ridden by Adults and Larger than normal children.
Anyway Here are some of the specs of the bicycle I built has a copy of the Raleigh Twenty.
The head tube on the Raleigh is 185 mm long mine is 100 mm long to take a front suspension fork with a Disk brake, I lengthened the head tube to seat post tube from 490 mm to 575 mm this is to allow more clearance from knees to handle bars, the seat tube on the Raleigh is 405 mm mine is actually reduced to 370 mm the reason for this is that I have moved the seat post to the rear more, this makes for easier pedaling for people with old stiff knees (mainly me) The wheel axle centers are the only thing that remain the same at 1000 mm.

The handle bar goose neck has been lengthened, and I shall be fitting a luggage rack and drink bottle holder soon.