Search found 395 matches

by graymee
12 Aug 2018, 11:39am
Forum: Bikes & Bits – Technical section
Topic: Replacing headset bearings
Replies: 16
Views: 1247

Re: Replacing headset bearings

This isn't an assembly fault, the bike is six years old and the fault had only recently manifested itself. I hope you loosened it first (then it shouldn't need hitting)! If you completely unscrew the bolt you will find it has an internal hex to fit an allen key to undo/retighten (after moving) the b...
by graymee
12 Aug 2018, 11:28am
Forum: Bikes & Bits – Technical section
Topic: RN "If you can fix a bike..." ad.
Replies: 13
Views: 963

RN "If you can fix a bike..." ad.

I've just seen a post on Facebook with a still from the Royal Navy "If you can fix a bike.." advert. Did a search, found the ad on YouTube and it appears to be genuine and not photoshopped. I am left wondering "How the hell did they manage to do this?"
by graymee
29 Jul 2018, 7:41pm
Forum: Bikes & Bits – Technical section
Topic: Replacing headset bearings
Replies: 16
Views: 1247

Re: Replacing headset bearings

Sorted now. For want of a better description, the bung that fits inside the top of the carbon fibre streerer tube seemed to have lifted up stopping putting the correct load on the bearing. I have repositioned this using a rubber hammer and all seems well for now.
by graymee
28 Jul 2018, 10:03am
Forum: Bikes & Bits – Technical section
Topic: Replacing headset bearings
Replies: 16
Views: 1247

Re: Replacing headset bearings

I've done the usual, loosened the 2 stem pinch bolts and tightened the headset cap bolt, no difference. If I take the stem, spacers and the tapered collar that sits on top of the frame off, the top sealed bearing pops out of the frame when I slide the steerer tube out. The bottom bearing remains in ...
by graymee
26 Jul 2018, 9:46pm
Forum: Bikes & Bits – Technical section
Topic: Replacing headset bearings
Replies: 16
Views: 1247

Replacing headset bearings

I want to replace the headset bearings on my 2012 Boardman Road Comp. If I hold the front brake on an rock the bike forwards and backwards there's quite a bit of movement. Taking the fork out of the frame the top bearing pops out. It's a 1 1/8th 1 1/2 inch tapered steerer, spec taken from https://ww...
by graymee
18 Dec 2016, 6:30pm
Forum: Bikes & Bits – Technical section
Topic: Crankset & BB compatibility
Replies: 8
Views: 1174

Re: Crankset & BB compatibility

My problem seems to be getting a double crankset compatible with a 73 mm MTB bottom bracket that has suitable chainring sizes. A 34 tooth small chainring is what I'm after paired with a 48 or 50 tooth large chainring or something close. I bought a road compact 34/50 crankset forgetting that road bot...
by graymee
18 Dec 2016, 3:33pm
Forum: Bikes & Bits – Technical section
Topic: Crankset & BB compatibility
Replies: 8
Views: 1174

Re: Crankset & BB compatibility

As I said in my 1st post I want to use my bike for a multitude of tasks and it's undergeared for some of them. It came with a 34 tooth chainring so 34/50 lets me use the same gearing as originally fitted and also have the higher gears. I'm now certain that although the Halfords and Boardman websites...
by graymee
17 Dec 2016, 10:14am
Forum: Bikes & Bits – Technical section
Topic: 10 and 11 speed compatibility
Replies: 3
Views: 638

Re: 10 and 11 speed compatibility

What about SRAM, FSA, etc?
by graymee
17 Dec 2016, 10:02am
Forum: Bikes & Bits – Technical section
Topic: 10 and 11 speed compatibility
Replies: 3
Views: 638

10 and 11 speed compatibility

Am I correct in saying that an 11 speed chain only differs from 10 speed in the external width and that the internal dimensions remain the same? Are 10 and 11 speed chainrings interchangeable?
by graymee
16 Dec 2016, 9:17pm
Forum: Bikes & Bits – Technical section
Topic: Crankset & BB compatibility
Replies: 8
Views: 1174

Re: Crankset & BB compatibility

Although the Boardman and Halfords websites say the bottom bracket is BB PF30 it has notched outer shells that you would expect on a threaded bb. I think it could be FSA Mega exo.
by graymee
16 Dec 2016, 7:15pm
Forum: Bikes & Bits – Technical section
Topic: Crankset & BB compatibility
Replies: 8
Views: 1174

Crankset & BB compatibility

I bought a Boardman Mountain Bike Team 29er which has a 1v11 drive train and a PF30 bottom bracket. I want to use it for a multitude of tasks and think the 34 tooth crank leaves it a bit low geared so intended to fit 34/50. I bought a SRAM Rival 22 11 Speed Chainset - BB30 BB but it doesn't fit. The...
by graymee
3 Dec 2016, 3:51pm
Forum: Bikes & Bits – Technical section
Topic: Wheel build - spoke length calculator
Replies: 11
Views: 953

Wheel build - spoke length calculator

I'm thinking of building myself a new pair of wheels. I have an old Excel spread sheet based spoke length calculator that has data such as rim ERD and hub flange diameter already stored for common rims and hubs. Unfortunately it's a bit out of date. Does anyone have a copy of or link to an up to dat...
by graymee
27 Nov 2016, 7:18pm
Forum: Bikes & Bits – Technical section
Topic: Wheel bearing size
Replies: 2
Views: 433

Wheel bearing size

I know my MTB rear hub has loose ball bearing but without taking it apart and measuring them I don't know what size. Is there a standard size of ball bearings for MTB hubs? 3/8" or 1/4" or does it vary from hub to hub?
by graymee
15 Nov 2016, 8:58pm
Forum: Does anyone know … ?
Topic: Another ill informed idiot starts a petition
Replies: 58
Views: 5160

Another ill informed idiot starts a petition

Another ill informed idiot starts a petition. https://www.change.org/p/theresa-may-mp-cyclists-to-hold-insurance-and-pay-road-tax-to-use-public-uk-roads?recruiter=45904988&utm_source=share_petition&utm_medium=facebook&utm_campaign=share_page&utm_term=mob-md-share_petition-custom_msg ...
by graymee
13 Nov 2016, 2:20pm
Forum: Bikes & Bits – Technical section
Topic: What happened to the Rear Shifting article?
Replies: 12
Views: 1064

Re: What happened to the Rear Shifting article?

Thanks Gaz, that's what I was looking for but they've obviously moved it. Pity it's not been updated recently. After another search I found this on Wiki that is more up to date. https://en.wikibooks.org/wiki/Bicycles/ ... Dimensions