Sunday, 17 May 2020

Fruit cage

A few hours on a warm Sunday.

I started with only a vague plan and 20 lengths of timber. 2.1m x 50mm x 25mm.


Saturday, 2 May 2020

Merida One-Twenty 7.800 suspension bearings

I hunted all over the internet to find out the sizes of the bearings in the frame on Shelley's bike. I did not have any luck finding any details for the 2015 model year.

The only solution was to take the bike apart and measure them.


Friday, 1 May 2020

Handlebar stabiliser

I've been looking for an easy to use handlebar stabiliser for use with the bike repair stand.

The one that looked like it would do the job is the Park Tools HBH-2. Unfortunately, in use with mountain bikes, it has a tendency to allow the bars to move too easily.

I used some elasticated shoe laces to make a small improvement.


Sunday, 26 April 2020

Bike maintenance experience

You can watch all the YouTube videos and follow all the instructions to the letter but sometimes you only get it right with experience.

My bike has been rattling for a week or so and finally I found the issue.

The cassette was loose.

When I changed the rear wheel, I had set it up exactly as per the original. What I now know is that there are sufficient differences between freehub drivers that some of them need spacers.

I've stripped it down, cleaned it up and fitted a 1mm spacer.

That's enough to allow the lock ring to clamp down on the cassette rather than on to the end of the freehub driver!

That's done the trick and the cassette is secure. I've adjusted up the gear change and taken it for a short test ride.

I also had a creaky bottom bracket (BB). Apparently this is not uncommon and not always easy to fix.

My attempt, at a fix, is to take the cranks off, put the BB press back on and clamp it tighter. I then re-assemble it.

The short test ride tonight is not sufficient to know if the creak is still there or not.


I've been for several rides. The creak was gone initially but returned on the third ride as noisy as ever.

"I wonder if anyone will ever do do a SRAM dub compatible press fit bottom bracket with a threaded inner sleeve to lock it in place?"
Perhaps I need to work on that design.


Tuesday, 21 April 2020

Wash your hands and stay safe

During these times of social isolation, due to Covid-19, Shelley is continuing to garden, as long as it is safe to do so.

Staying away from people, in her job, is not difficult however, she may not always know what her customers have touched in their gardens. She needed to be able to wash her hands. To that end, her Defender now has a hand gel dispenser.

I designed and 3D printed a simple holder that easily hooks on the dash.

Printed in two halves to avoid the need for masses of supports.

It has a simple joint formed of an arc, 10mm wide by 1mm deep.

It slides together like a dovetail joint but does not have an overhang so it can be easily 3D printed without supports.

It's printed in PLA, for ease and speed, so it won't survive hot sun in the car for a prolonged period. Hopefully we won't be in 'lockdown' for so long that it matters.


Thursday, 16 April 2020


Working from home I have been doing a lot of video calls and the importance of my webcam has been raised. I had an ageing Microsoft LifeCam which, in a recent Windows 10 update, became unmanageable and the image to dark to be usable!

This has meant that over the last few days I have used a number of different solutions and I decided to do a quick comparison of the images.

Built in Lenovo laptop camera

Old GoPro lookalike Action Camera from my bike.
Not ideal as a webcam because it needed turning on and setting to webcam mode every time I started the computer.

Logi C920 camera

My opinion is the C920 is a much better image.

I also tried a couple of positions. I think front on from above is best. The laptop view is the best but to achieve that with my main monitor it is too low for me.


Thursday, 9 April 2020