Unanswered Questions

7
votes
2answers
301 views

Identify this shaft driven bike for me

I can't identify the manufacturer nor the year it was produced. It has a serial number on the frame, just above the front fork, something like 93042829 or so what (peculiarity: the numbers are ...
6
votes
0answers
137 views

Is changing wheel necessary if freewheel hub with a different speed then previous is attached?

Approx. 3 weeks ago I have found an abandoned frame (including steering wheel, fork, brakes, pedals and shifting gears attached to it). I decided to use it to build a new bicycle since only recently I'...
5
votes
0answers
64 views

Stripped thread on steerer. Who is at fault - me or LBS?

Background I ride a Peugeot PKN10 (1980 or 1979 I'm unsure of the exact date). Three months ago I had a cracked chainstay replaced at my LBS. This required removal of the original fork and headset ...
5
votes
1answer
296 views

Flashpoint FP80 / SRAM S80 - rear hub specifications?

I'm looking for the specs of a SRAM S80 rear wheel hub. I dearly wish to replace its 9/10-speed freehub body with one that can accomodate Shimano 11-cog casettes. SRAM S80 was a 80mm-profile aero ...
5
votes
0answers
167 views

Accurately replicating the resistance felt whilst riding via a resistance fan diy turbo trainer

If I were to build my own Lemond Revolution style turbo trainer (link below) could I use the air speed in meters/second^2 the rider is moving into as a good indicator of what type and size of fan to ...
4
votes
0answers
56 views

Cylinder volume of hydraulic brakes and levers

I've been asking around for a while now but even workshop pros couldn't answer this (by citing exact figures): How big are the brake cylinders of disk and rim brakes in terms of volume and surface ...
4
votes
1answer
177 views

Proper tubular tire installation

I'm trying to install a new tubular tire once again. The problem is every time I do this I always get it wrong because I always have this area (let's say 10-15cm each way) around the tire's valve that ...
4
votes
0answers
497 views

Change the angle of the arc of downtube / stem shifter lever to make it an alternative thumb shifter?

I want to mount the following SunRace clamp-on shifter set horizontally as a "thumb" shifter on a straight MTB handlebar (22.2mm). I will remove the left lever and only use the right with the clamp. ...
3
votes
0answers
42 views

Replace Regina valve with Presta

I have recently bought an Italian bike that uses Regina valves and I need to replace one of the inner tubes. Since I don't live in Italy and can't find that kind of valve anywhere, I thought of using ...
3
votes
0answers
58 views

Odd screw on brake disk

Worked on my first disk brake bike yesterday. It was a full-suspension BSO with cable disk brakes. The rear wheel had two broken spokes, and they where threaded such that I could not replace the ...
3
votes
0answers
52 views

Uncut steerer tubes too short for 21" Frames

I am restoring two old bikes a 1996 Trek 8000 and 2000 Fuji Aloha. Both are 21" frames. The problem I am having is getting forks that do not cost $1000 and have steerer tubes with sufficient lengths. ...
3
votes
0answers
53 views

Internal cable routing blocked on '80s steel frame. What are my options?

I have a new-to-me ~80's steel frame with a rear derailleur cable that is routed through the chainstay. There's a blockage close to the BB end, and I'm wondering what my options are? My assumption is ...
3
votes
1answer
54 views

Can old, stiff friction shifters be made serviceable?

I've got a few friction shifters knocking around but all seem so rough as to be impossible to use on a bike. Are they meant to be like that or can a service be done on them to get good use out of them?...
3
votes
2answers
136 views

Choosing the right bike size

I'm looking to get the Trek Domane 4.3 and debating between a size 54 and a 56. One shop I've been to told me I'm a 56 and another said 54. According to Trek's sizing chart I'm 56. I am 5 9" with an ...
3
votes
0answers
46 views

Alfine 8 gear crunch

Occasionally under load when taking off on the flat, I would get a crunch, then it runs smoothly. After reading the other post I had tightened the wheel nuts but this has not fixed the issue. I have ...

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