Search found 27 matches

by OldLimey
23 Sep 2020, 8:35pm
Forum: Fun & Games
Topic: Very Low Geared Fat Bike
Replies: 3
Views: 106

Very Low Geared Fat Bike

I modified my Specialized Fatboy with very low gears, and a large front tire. I had to build a special back wheel to accommodate the huge cassette.

big cassette.jpg
by OldLimey
19 Sep 2020, 10:49pm
Forum: Bikes & Bits – Technical section
Topic: BB Spacers
Replies: 22
Views: 577

Re: BB Spacers

some SRAM cranks can use an external preload adjuster, which fits between the crank and the rest of the BB, in place of one of the spacers. https://forums.roadbikereview.com/attachments/components-wrenching/292877d1394301181-sram-force-22-pf30-question-pf302.jpg If this is fitted then there is no n...
by OldLimey
19 Sep 2020, 10:19pm
Forum: Bikes & Bits – Technical section
Topic: BB Spacers
Replies: 22
Views: 577

Re: BB Spacers

OldLimey it's not a dust cap, it's a preload cap. I can only find metal ones that use an allen key (which is better because the proprietary Shimano tool isn't needed then). I take it the M20 is a 20mm thread. That doesn't sound like it's big enough to fit the spindle thread. The spindle is 30mm ove...
by OldLimey
19 Sep 2020, 3:13am
Forum: Bikes & Bits – Technical section
Topic: BB Spacers
Replies: 22
Views: 577

Re: BB Spacers

The bike never had a cap that screws into the crank spindle. I made sure there is no play. If there was, it would affect the FD. It's meant to have one, I'd get one, but it's another thing that's overpriced for what it is and if your setup has no play that you can feel, it's probably OK. The trick ...
by OldLimey
19 Sep 2020, 2:02am
Forum: Bikes & Bits – Technical section
Topic: BB Spacers
Replies: 22
Views: 577

Re: BB Spacers

OldLimey, what did you end up cutting? A spacer you already had that was too wide? The bearings are press fit and don't need preloading. They do still need a preload, well it's not so much a preload but it's a cap to make sure there's no gap. You should have a plastic preload cap screwed into the e...
by OldLimey
18 Sep 2020, 10:49pm
Forum: Bikes & Bits – Technical section
Topic: BB Spacers
Replies: 22
Views: 577

Re: BB Spacers

Looking at that photo it doesn't look too bad to me actually - is 4mm of the actual crank spline visible (it doesn't look that much to me but it might just be how I'm seeing the photo), or 4mm to the outside edge of the crank? You need at least a mm of spline showing inside the crank to be able to ...
by OldLimey
18 Sep 2020, 10:35pm
Forum: Bikes & Bits – Technical section
Topic: BB Spacers
Replies: 22
Views: 577

Re: BB Spacers

if you can't get thin spacers, you need a friend with a lathe. cheers I thought of that. I can use a lathe but don't have access to one. I thought of using a hacksaw to do it but I'm sure you know how they wander off a line. Not easy, but quite possible. The trick with something like this is to sta...
by OldLimey
18 Sep 2020, 9:04pm
Forum: Bikes & Bits – Technical section
Topic: BB Spacers
Replies: 22
Views: 577

Re: BB Spacers

I appreciate all the responses. It points me in the right direction especially about not leaving it the way it is. I might even try using a junior hacksaw to trim them down, and if I screw that up, well, I have another bike to ride until I can get new spacers. If I'm successful in cutting them down,...
by OldLimey
18 Sep 2020, 8:59pm
Forum: Bikes & Bits – Technical section
Topic: BB Spacers
Replies: 22
Views: 577

Re: BB Spacers

Valbrona wrote:Wheels Mfg do a range of 30mm spacers: https://wheelsmfg.com/products/bottom-b ... acers.html


I've been looking at that shop. I might have to go with their 10mm, 5mm and two 1mm spacers.
by OldLimey
18 Sep 2020, 8:56pm
Forum: Bikes & Bits – Technical section
Topic: BB Spacers
Replies: 22
Views: 577

Re: BB Spacers

Hi There should be a hook doo-dad that fits between the two crank bolts and engages with a hole in the axle to prevent the crank falling off. If this isn't lined up then you are asking for problems Your local bike shop probably puts a few spacers in the bin/spares box weekly, biscuits are sometimes...
by OldLimey
18 Sep 2020, 8:42pm
Forum: Bikes & Bits – Technical section
Topic: BB Spacers
Replies: 22
Views: 577

Re: BB Spacers

if you can't get thin spacers, you need a friend with a lathe. cheers I thought of that. I can use a lathe but don't have access to one. I thought of using a hacksaw to do it but I'm sure you know how they wander off a line. I can get bags of 1mm spacers but would rather not have seventeen of them ...
by OldLimey
18 Sep 2020, 5:03pm
Forum: Bikes & Bits – Technical section
Topic: BB Spacers
Replies: 22
Views: 577

BB Spacers

I'm having a frustrating time trying to find the right BB spacers. I have a fat bike - 100mm BB shell. Currently, it has two spacers, one either side of the shell, 30mm x 19mm thick. My left side pedal fell off a week ago. It seems that the spacers are too thick because the crank doesn't go onto the...
by OldLimey
13 Sep 2020, 4:45pm
Forum: Bikes & Bits – Technical section
Topic: Front Lights in Daylight
Replies: 104
Views: 3297

Re: Front Lights in Daylight

Although motorcycling is a different world, I took the experienced rider course three times in ten years, and it was always emphasized to wear bright clothing. Respectfully, it's not really a surprise if a motorcycling trainer teaches the established orthodoxy, is it? Plus, it's far from certain th...
by OldLimey
13 Sep 2020, 2:40pm
Forum: Bikes & Bits – Technical section
Topic: Front derailleur reluctant to change up recently
Replies: 23
Views: 758

Re: Front derailleur reluctant to change up recently

About three-hundred yards from home, the left pedal began to feel a bit wobbly, and I thought I'd have to get a new set of pedals. Then two-hundred yards from home the whole crank arm fell off into the road. It's been a couple of years since I checked the bolts so it's my fault. Twice in recent days...
by OldLimey
30 Aug 2020, 2:18pm
Forum: Bikes & Bits – Technical section
Topic: Front Lights in Daylight
Replies: 104
Views: 3297

Re: Front Lights in Daylight

What I wear is pretty much irrelevant to visibility because my bikes have good German-spec lights, wheel and pedal reflectors and reflective wheel bands and some of them have the rear quarter of the back mudguard painted white. Any driver looking at my bike doesn't need to see the rider. Even so, p...