Sunday, April 28, 2019

Tandem restoration tidbits: Peugeot TM 8 frame modifications and repaint

The original pearlescent white hat quite a few scratches, some specs of rust and we didn't really like the original 'record du monde' transfers with checkerboard graphics. And as there were a few modifications we wanted to make to the frame we decided not to hold back with the torch and go for a repaint complete with our own decals.

Peugeot Tandem TM 8
Repaint: Before and after.

Peugeot Tandem TM 8
Repaint: Before and after.

Peugeot Tandem TM 8
Repaint: Before and after.

Among the modifications we wanted to make were:
  • conversion of the shifter boss threads from M5x1 to the common M5x0.8
  • adding water bottle bosses
  • adding a braze on for a Simplex 'direct mount' front derailleur to replace the orginial one with the fragile delrin band.
  • reinforce the 'mixte-laterals' in an attempt to fight some of the frame's lateral whippyness
  • add a chain-rest
  • add a cable housing guide for the rear derailleur
  • re-shape the lopsided twin fork crown which must have been brazed in a hurry and without alignment
  • slightly re-file some of the generally beautiful fillets
Frame modifications: brazing of an M5x0.8 insert into the original Simplex
shifter boss.

Frame modifiactions: An M6 threaded boss was added in order to
accommodate a Simplex 'direct mount' front derailleur.

Frame modification: Triangulation of the 'mixte-laterals' in an attempt to remedy
the whippyness of the frame.

Frame modifications: Added chainrest for rear wheel removal and transport.

Frame modifications: Three pairs of braze-ons for bottle cages.
Choosing a color was not obvious, and we hesitated between the original pearlescent white, some blue, toxic green, metallic orange and candy apple red. Pearlescent white was not available from the powder coater, we couldn't agree on any of the samples of blue in the shop, nor for the orange which can be hit and miss, and the toxic metallic green we found gorgeous on the sample tends to turn out differently on painted frames we saw in the shop, so we finally settled on candy apple red which I like on the Velo Velo Orange Pass Hunter, and which works well with the decals of our own design.

Decals: Manufacturer Peugeot.


Decals: Captain C. Strohm.

Decals: Stoker C. Tonner.

Decals: Headbadge and fork stickers.


Monday, April 8, 2019

Tandem restoration tidbits: decals for the Peugeot TM 8

With the frame out for powder coating came the time to consider the question of decals. We were admittedly not very fond of the orange 1980s 'record du monde' decals with black checkerboard graphics. And we did not see any good reason to restore our specimen of the Peugeot TM8 to original condition. But we thought it a nice touch, to give some hints to its country of origin, state of residence, owners, and manufacturer.
Decals for the creative restoration of our Peugeot TM 8 Tandem
Decal set for the restoration of our Peugeot TM8. Made in France,
restored in SH. The northermost german state and 'la grande nation'
fly the same colours in their flags. Cut-lines in pink, grey for trans-
parent areas.
Free from period and other constraints we went wild and got inspired by graphic elements from a wonderful Ducheron, exploited the coincidence that the country of origin and our state of residence fly the same colours on their flags, borrowed traits from a famous signature, and finally chose lettering the manufacturer used about 30 years prior.

Monday, March 18, 2019

Tandem restoration tidbits: taillight and reflector mount

German traffic regulations require bicycles to be equipped with a taillight and a large area reflector labelled 'Z'. And while the taillight and said Z-reflector can be combined into a single unit, I am not aware of any fender mounted option here.
Schmidt SON fender mounted taillight and custom reflector mount, Gilles Berthoud fender
Schmidt SON fender mounted taillight and B&M Z-reflector with custom mount
on Gilles Berthoud Fender.
There is a large choice of rack mounted taillights integrating the Z-reflector, but they somehow do not fit with the aesthetics of a vintage tandem.

Busch und Müller rear reflector with custom mount
Jigsaw exercise.
And among the many fender mounted reflectors, I could not find a single labelled 'Z' - which means it qualifies as a large area reflector (in contrast to simply 'optional' fender mounted reflectors).  The smallest reflector labelled 'Z' with a low aspect ratio is made by Busch and Müller and actually intended to be mounted on the seat post.

Busch und Müller rear reflector with custom mount
Prototypes and final result. The 'Z' in addition to the 'K' approval on the reflector
indicates that its a homologated large area reflector.

With that as a starting point I was now looking for a small fender mounted taillight without reflector and for a design to mount said reflector there as well.

First attempt and final shape.

This left me basically with two choices, the brand new Busch and Müller 'Mu', and the little gem made by Schmidt, which I finally selected. For the mount of the reflector, I was looking into a folded sheet metal piece picking up the theme of the headlight mount to give the whole seeing-and-visibility-thing some unity front to back.


Busch und Müller rear reflector with custom mount
Rear reflector riveted to the Gilles Berthoud fender.
I came up with another U-shape, wrapping the bulky mount originally linking the reflector to the seat post mounting band with a ball head. It took me some iterations with the jigsaw to find a workable shape, placing the reflector at the desired height.


Busch und Müller rear reflector with custom mount, Gilles Berthoud fender
4 mm plain alu rivets. Lightweight, strong, and do not rattle loose.
As for the headlight mount, simple plain alu rivets were chosen as fasteners for being unbeatably light, low profile on both sides, and absolutely insensitive to vibrations.

Schmidt SON fender mounted taillight and custom reflector mount, Gilles Berthoud fender
Fully STVZO conform taillight and Z-reflector escaping the
ubiquitous, and tiring look of the german-safety-add-on afterthought.









Saturday, February 9, 2019

Theme ride: Bremen to Hamburg

From the Bremen town musicians to Elbphilharmonie


With the brevet season starting soon its time to think about a little longer rides. And when the forecast announced a moderate breeze from south-west, we decided to go for a sailing trip from Bremen to Hamburg together with Jakob. The idea being to claim a few kilometres back from the wind.  After plowing into a constant headwind for 280 km straight during the time trial Hamburg Berlin lately for example, I didn't feel guilty to take advantage from the reliable tailwind that was announced for this choice of route. 

Bremen Town Musicians to Elbphilharmonie Hamburg
From the Bremen Town Musicians to Elbphilharmonie. One of the best views
on the Elbphilharmonie is from the square in front of the musical venues, just
before the old St Pauli Elbtunnel  (currently only pedestrians and bikes).

And it makes for a music themed ride from the Bremen Town Musicians to Hamburgs new landmark. Following largely the route of the bike trail Bremen Hamburg, large portions of the trip were on absolutely beautiful backroads free from traffic, - and open to the favourable wind.

Map. With a moderate breeze from south west this equates 120 kilometres of
pleasant downwind riding.
The wind forecast for Germany the 09.02.19 at 15h at 10 m looks promising.
Our ride direction indicated as a pink arrow.

The only thing we hadn't really anticipated were a few good spells of rain as part of the trade. Worth every kilometre, with the exception of the bike path along the busy state road between Neu Wulmstorf and Harburg, before the nice finish in the heart of Hamburgs harbor and with a crossing of the St Pauli Elb-tunnel.