a.twiddler
Veteran
Since last summer I have been keeping an eye out for a drum brake 406 wheel for the Linear to give a wider choice of tyres for the front. The rim that came on the drum brake which was on it was a 440 size which takes a 500A tyre, a French size which just gives you a choice of Michelin 500A Confort white wall or .. that’s it. There’s a Dutch size which is a 438 which can be squeezed on if the tolerances are loose in the right direction. I managed to get one of those on quite easily but it’s a swine to get it seated properly if you have to take it off at all. At least it lets me use a Schwalbe tyre with a reflective strip and some puncture resistance, but although it runs well it’s not a long term solution.
A couple of weeks ago I bought a drum brake wheel from eb*y which stated that it was a “tandem front wheel from a Bike Friday”. The seller gave the spindle dimensions and they seemed compatible. My understanding of tandem drum brakes was that they were used on the back, as a drag brake in addition to rim brakes. The only difference I can see from a solo drum is that there is a “T” stamped on the torque arm, and the brake arm is a little shorter than the one already on the bike. The drum width and diameter are the same. The width OLN is 100mm while the original is 96, and the spindle diameter is the same.
Before:-
After:-
I had a couple of spare Schwalbe Big Apples in the garage, so for the sake of setting up the wheel I put one of those on. Plenty of clearance in the fork, the tyre is nominally 50mm but measures 44mm fitted. It looks enormous compared to the 37mm wide previous occupant. The diameter is noticeably smaller than the previous wheel with a lot of mudguard clearance, and the mudguard itself looks skinny. Hence “the bike that ate all the pies”. The mudguard looks as if it needs a good meal by comparison.
The Big Apple is wider than the rear, a Vittoria Randonneur 700 – 42C which is actually 38mm wide so my preconceptions lead me to expect that after a trial I will be looking for a 37 – 406 for the front. It’s not an off road downhill racer after all. With a lightly loaded front, a narrower tyre might concentrate the weight better for grip, though it will be interesting to see how the BA copes. It might be a surprise, in a positive way.
The Randonneur supposedly has high rolling resistance but as a rear tyre has supple sidewalls and a good thickness of rubber, but for the front something lighter would be desirable. Some puncture resistance and a reflective sidewall would be nice, to match the rear.
The brake has a decent amount of bite and feel on the stand but hasn’t been tried in earnest yet.
Also visible is my Mk1 home made frame fitted front rack, still on trial. I think it gives this great long bike a rather crocodilian appearance.
A couple of weeks ago I bought a drum brake wheel from eb*y which stated that it was a “tandem front wheel from a Bike Friday”. The seller gave the spindle dimensions and they seemed compatible. My understanding of tandem drum brakes was that they were used on the back, as a drag brake in addition to rim brakes. The only difference I can see from a solo drum is that there is a “T” stamped on the torque arm, and the brake arm is a little shorter than the one already on the bike. The drum width and diameter are the same. The width OLN is 100mm while the original is 96, and the spindle diameter is the same.
Before:-
After:-
I had a couple of spare Schwalbe Big Apples in the garage, so for the sake of setting up the wheel I put one of those on. Plenty of clearance in the fork, the tyre is nominally 50mm but measures 44mm fitted. It looks enormous compared to the 37mm wide previous occupant. The diameter is noticeably smaller than the previous wheel with a lot of mudguard clearance, and the mudguard itself looks skinny. Hence “the bike that ate all the pies”. The mudguard looks as if it needs a good meal by comparison.
The Big Apple is wider than the rear, a Vittoria Randonneur 700 – 42C which is actually 38mm wide so my preconceptions lead me to expect that after a trial I will be looking for a 37 – 406 for the front. It’s not an off road downhill racer after all. With a lightly loaded front, a narrower tyre might concentrate the weight better for grip, though it will be interesting to see how the BA copes. It might be a surprise, in a positive way.
The Randonneur supposedly has high rolling resistance but as a rear tyre has supple sidewalls and a good thickness of rubber, but for the front something lighter would be desirable. Some puncture resistance and a reflective sidewall would be nice, to match the rear.
The brake has a decent amount of bite and feel on the stand but hasn’t been tried in earnest yet.
Also visible is my Mk1 home made frame fitted front rack, still on trial. I think it gives this great long bike a rather crocodilian appearance.