Search found 187 matches

by bgnukem
30 May 2019, 12:38pm
Forum: Bikes & Bits – Technical section
Topic: Gouge in 631 steel frame
Replies: 29
Views: 1201

Re: Gouge in 631 steel frame

I had a would be thief try and steel my dawes Horizon that has a 531 steel frame , he/she/it then decided to destroy the frame with a supermarket trolly as it found the bike was locked up too well. The pont of all this I was surprised how thin the steel tube was, so I am a bit wary of dents and suc...
by bgnukem
29 May 2019, 6:13pm
Forum: Bikes & Bits – Technical section
Topic: SP dynamo hubs - narrow flange spacing
Replies: 32
Views: 1237

Re: SP dynamo hubs - narrow flange spacing

Here's the thread which referred (in 2017) to a refurbishment service: https://forum.cyclinguk.org/viewtopic.php?t=112106 I guess the bearings will start to feel rough, but can be hard to tell when the dynamo cogging effect (electromagnetic resistance) is very marked when rotating the axle by hand. ...
by bgnukem
29 May 2019, 6:02pm
Forum: Bikes & Bits – Technical section
Topic: Gouge in 631 steel frame
Replies: 29
Views: 1201

Re: Gouge in 631 steel frame

Looks like mainly indentation with some material thinning at the scratches as you say. If it's in the thicker-walled part of the tube I'd be tempted not to worry about it too much. Maybe just check occasionally The scratches are relatively open/large radius of curvature which will tend to reduce the...
by bgnukem
29 May 2019, 5:56pm
Forum: Bikes & Bits – Technical section
Topic: Gear set up problem
Replies: 6
Views: 230

Re: Gear set up problem

That explains the problem then! Thanks Brucey for clarifying that.

I also use butchered cassettes with 7 sprockets of an 8 or 9-speed cassette, so far without any issues as I've just used the corresponding index positions and dummied off the bottom gear position/s using the rear mech limit screw.
by bgnukem
29 May 2019, 12:52pm
Forum: Bikes & Bits – Technical section
Topic: Gear set up problem
Replies: 6
Views: 230

Re: Gear set up problem

Dumb questions maybe (no offence intended) but is the cassette definitely also 9-speed? Is the shifter in the top gear position when the derailleur is aligned with the smallest sprocket? Maybe pull the cable and keep clicking the shifter when the derailleur has hit the top limit screw to check, then...
by bgnukem
29 May 2019, 12:43pm
Forum: Bikes & Bits – Technical section
Topic: SP dynamo hubs - narrow flange spacing
Replies: 32
Views: 1237

Re: SP dynamo hubs - narrow flange spacing

I've got one too. Don't think the bearings are user-serviceable (can see no way to access) but I gather the distributors (Ison?) offer a refurbishment service for bearing replacement if you send the hub back to them.
by bgnukem
29 May 2019, 12:41pm
Forum: Bikes & Bits – Technical section
Topic: Gouge in 631 steel frame
Replies: 29
Views: 1201

Re: Gouge in 631 steel frame

Maybe try to find out if the ding is in the thicker butted portion at the end of the tube or within the thinner area towards the centre. You can try tapping the tube and listening to the noise. If the former, then less to worry about. Could you estimate the depth of the defect maybe using a straight...
by bgnukem
28 May 2019, 7:21pm
Forum: Bikes & Bits – Technical section
Topic: Loose seatpost - Spa Aubisque frameset
Replies: 67
Views: 3946

Re: Loose seatpost - Spa Aubisque frameset

Rest of the frame looks OK but I've not checked alignment or dimensions TBH. So far efforts to sand down a 27.4 'post to fit haven't been particularly successful. I'll be taking the bike back to the shop in June.

What other issues did you find with your frame?
by bgnukem
13 May 2019, 11:06am
Forum: Bikes & Bits – Technical section
Topic: Crank Length - formula?
Replies: 22
Views: 760

Re: Crank Length - formula?

Having long legs and pedalling fairly slowly I find I prefer 180mm cranks and would try 185s if I could find them, but the choice isn't there. 9.5% of my height would be 186mm according to the Obree formula. 20% of inside leg length (the other formula I've seen used) would be ~183mm. Does anyone sti...
by bgnukem
9 May 2019, 3:01pm
Forum: Bikes & Bits – Technical section
Topic: Test riding a collection of saddles - weird
Replies: 10
Views: 728

Re: Test riding a collection of saddles - weird

I tried to break in a Spa saddle but gave up after about a year when it was clear that the leather wasn't going to soften or move in the slightest! I had bought it from another rider who also failed to break it. Bearing in mind I'd previously owned 3 Brooks saddles I knew what to expect with the br...
by bgnukem
8 May 2019, 1:27pm
Forum: Bikes & Bits – Technical section
Topic: Test riding a collection of saddles - weird
Replies: 10
Views: 728

Re: Test riding a collection of saddles - weird

I tried to break in a Spa saddle but gave up after about a year when it was clear that the leather wasn't going to soften or move in the slightest! I had bought it from another rider who also failed to break it. Bearing in mind I'd previously owned 3 Brooks saddles I knew what to expect with the bre...
by bgnukem
7 May 2019, 2:14pm
Forum: Bikes & Bits – Technical section
Topic: Recommended Cantilever Brakes
Replies: 29
Views: 1313

Re: Recommended Cantilever Brakes

Why might v-brakes be better? They're not. They both have they're issues. Setting up canti's is easy, and once done they function every bit as nicely as any other rim brakes. Don't take advice from people that reckon they're awkward to set up - they've just admitted they don't know what they are do...
by bgnukem
3 May 2019, 12:46pm
Forum: Bikes & Bits – Technical section
Topic: SP dynamo hubs - narrow flange spacing
Replies: 32
Views: 1237

Re: SP dynamo hubs - narrow flange spacing

Problem I found with mine is the spokes are too far away from the fork leg to allow a cycle computer sensor to work properly!
by bgnukem
3 May 2019, 12:45pm
Forum: Bikes & Bits – Technical section
Topic: Loose seatpost - Spa Aubisque frameset
Replies: 67
Views: 3946

Re: Loose seatpost - Spa Aubisque frameset

Spoke to Spa today and will take bike back to shop next time I'm in the area (June) for them to take a look. measured seat tube at 27.31mm diameter, one nominal '27.2' seatpost was between 27.02 - 27.08mm and the other around 27.14 - 27.18mm. So it seems the seatpot I bought for the bike is a little...