News and Events

Keep up to date with the latest news and events of Modular Bikes.

Sunday, September 19, 2021

Fixing 50 bikes, Bike 29, Tourex



This was the bike I picked up yesterday after dropping off the Hard Rock Specialized. There's not too much wrong with it but the front derailleur is not working and the brakes and chain need attention.

Wednesday, September 15, 2021

New Bike Part 8: on the road


Back of the frame.

Fork detail, the white parts are plastic spacers which slide on the inside of the frame and keep the fork in the centre of the frame. rubber blocks can be seen top and bottom.

Front derailleur, a large lower jockey pulley has been swapped out for a smaller wheel. That meant the chain wasn't being pinched when changing into low gears.


My new bike's on the road, and I took it on a 3-4k ride today, and took the opportunity to take a few photos. It was actually going on Monday, but it was really only limping, the brakes adjusting, gears and steering all needed adjusting, and I've finished that now. There is still more work to be done.

I want to design and print new rear fork spacers, bog and paint the fork and make a new tailbox. As well I want to weigh a few parts and compare them with eqivalent leaning trike parts.

All for now

Regards Steve nurse 

Update Sep 16

Designing MK2 version of spacer parts.
Solidworks has a nice mirror function so its not necessary to....

design left hand and

right hand versions from scratch

Printing on Cetus 3d printer.

Reassembled fork with new spacers. There are pins in the prong which stop them sliding on their shaft.


This shows today's work very happy with results and I went for a ride of about 10k up to Kew Boulevarde. Fun to ride!

Tuesday, September 14, 2021

Links to my bike related designs







This post is a place holder to start with, and I will gradually add more links. For now, here is a link to body inertia braking for recumbents and the latest on my new bike with frame-enclosed rear suspension .

Shelf / Glove box inside front fairing.

Inner trailer, fits between the wheels of a long wheelbase bike. 

Helmet mirror, links to helmet parts on thingiverse

Small at the back, a rant discussion about the merits of large tailboxes on recumbents for aerodynamics and storage.

Summary of making crate adapters for Peugeot NS22's

Typical steerer from scooter parts.

Helmet with visor mirror on thingiverse

Trike frame from single unmodified aluminium extrusion piece (beer bike

DIY front wheel drive forks for fixed bottom bracket bikes.


Steve Nurse



Sunday, September 12, 2021

Fixing 50 bikes, Specialized Hard rock

As traded but chain is removed


With handlebar extenders, they work well for this sort of thing, inverting the bike for service and repair

I didn't know what these do-dahs (Sugino Autex crank bolts) were but looked them up on the internet and 

found some new- old - stock versions on ebay. A solid steel bolt cover allows the cranks to self-extract. You just keep turning the crank bolts after they hit the cover, which then pushes the pedal off. Saves carrying a crank extraction tool.

Eveready light

Sharkfin frame protector and

gunk deflector.

Chain, nicely cleaned up after

dowsing in vinegar, then kero, then pressure spraying with water and finally running through a chain cleaner.

Concerned Off Road Bicyclists Association sticker, they are still around today in the USA. I think this sticker dates the bike to after 1987.

and this dates the bike as fter 1990, its from True Wheel Cycles in Mullumbimby

Cleaned up chainring

Handlebars stripped, cleaned, replaced.

Handbrakes were covered in a gunk-like substance which may once have been rubber. It had the llok and feel of licorice.


Progress sofar on resurrecting this Specialized Hard Rock bike which came from our friend Rita. A restoration would involve more work, polishing every part to a sparkling cleanliness. I'm aiming to get it working well and will be cleaning the bottom bracket soon.

Update September 15: Rita came round again and I asked her about the bike. She'd got it from a friend in Mullumbimby where she used it on trails and around town, then took it down to Melbourne. She was put off commuting by horrendous traffic on Sydney road and it fell into disrepair.

Regards  Steve Nurse

Handover to Wecycle. During the ride I had discovered the handlebars and bell were slightly loose so I fixed them. As well I attached the checking tag, and picked up another bike requiring attention, a Tourex.

Wednesday, September 8, 2021

New Bike Part 7

How the bike is now.


Squaring the rear fork by placing a straight edge on the rim.

Aligning to the front part of the fork.

Bike with seat from this bike and rear fork in place. The seat is too far forward, and soon I'll be redoing the seat support beam (its from the same material as the frame) so its more vertical and the seat can go back.

Rear fork mech. I have put F clamps on the frame, and they are supporting the mech. I am still working out a few details.


This post is about finishing off the bike's rear fork. Its all brazed up and straight now but I still need to find a way of pinning it to the frame. As a bit of relief I've started working on the front derailleur, chain and seat and should have them in place soon.

Seat support mock-up. I've repositioned the seat support (its made from the same stuff as the frame) and clamped it to the frame.

View from top

Sawing to marked position

Drilling jig

And all put back together.

Update 12 Sep 2021

Good progress today, I now only need to connect brake and gear cables and I will be ready for a short test ride.

Regards Steve Nurse

Saturday, September 4, 2021

New Bike Part 6

Rear fork with newly 3d printed spacers. These stop the prong of the fork from being loose inside the frame. They were my plan B.

Here it is inside the frame, and

with half of the spacer exposed.

Slept on it last night and decided to use these aluminium beams as frame jigs.

Here's the new jig on the bike, holding the back wheel  in position,

and as I left things at day's end, with 2 tubes braze-tacked onto a cross piece. Some parts are still bolted together. Next step

This was my plan "A", I had planned to cut plastic from these upcycled storage bins to make spacers for the rear fork. But it looks like 3d printing will be simpler and easier.


Here is today's progress on the bike and I am quite pleased! After thinking about it overnight, I decided to use an aluminium jig to hold the back wheel in place, and flattened the tyres before clamping it to the rims. This morning I designed and printed a few spacers so the rear wheel fork would not waggle inside the frame.

By this afternoon, I had all the bits together and was able to tack some of the rear fork together. Tomorrows job will be to finishbrazing the fork.  I plan to redesign the plastic fork spacers but am happy with the job my trial versions have done.



Steve Nurse

Friday, September 3, 2021

New Bike Part 5


Some work on the shed, I made the rod at the top which sits on pins and keeps the door open. The 2 milkcrates with stuff on top used to do this job badly and would blow out of the way on windy days.

Front shed tidy up. All the plywood had been on the ground, and now its quite tidy.

And finally some work on the bike. The stick of wood at the base keeps the 2 wheels in line, and soon I'll be able to put the rear fork in place so it can be tacked up and finally completed.


Good progress on the bike today, a few hours were spent tidying things, and soon I'll be ready to finish the rear fork.  

We have every right to feel depressed here in Melbourne now, Coronavirus numbers are up, and its been raining all afternoon, but I'm feeling ok having got a few jobs out of the way.


Steve Nurse

Thursday, September 2, 2021

New Bike Part 4


From last time, this is about where I want the rear wheel to be placed on the new bike,
and from a long time ago, I have this rear wheel fork

which I'm cutting up for bits,

and adding to some 19mm square cro moly to make a new fork.

Finding a disk brake

Fork progress to date.


Just a few pictures of progress on the bike which is gong well. I've made enough of the rear fork to mock up on the bike before welding and will have a go at finishing it tomorrow. Big lockdown here in Melbourne, I have every chance of finishing it soon!  

Regards  Steve Nurse