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Search: Posts Made By: Antifriction
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Forum: Folding Bikes
09-26-22, 04:00 PM
Replies: 9
Views: 343
Posted By Antifriction

My aluminum Dahon seatpost is 34mm. However I...

My aluminum Dahon seatpost is 34mm. However I don't think you have a problem; the minimum insertion marking on my post is 4.5" from the bottom, so that's a safe amount of overlap. If you insert more...
09-20-22, 03:32 AM
Replies: 54
Views: 1,149
Posted By Antifriction

As others have said - your gearing is high. A...

As others have said - your gearing is high. A 22/32/42 crankset can be had for $50 & would give you two gears below your current lowest. Also 28t is a stingy low sprocket; a cassette going to 32t or...
09-15-22, 11:03 PM
Replies: 26
Views: 536
Posted By Antifriction

New top gear is up 14% - basically adding one...

New top gear is up 14% - basically adding one gear above what you had. So, no worries - now you'll be staying in your top 4 gears.
09-09-22, 03:47 PM
Replies: 11
Views: 233
Posted By Antifriction

So, next steps here:...

So, next steps here: https://www.bikeforums.net/bicycle-mechanics/1133057-ashtabula-sprocket-question.html
09-08-22, 05:07 PM
Replies: 8
Views: 271
Posted By Antifriction

That road gearing is way high for touring. The...

That road gearing is way high for touring. The 39t would make a good big ring; 39/11x27.5" is a 97" gear. Current Kona Dew, for example, comes with 22-36 on the front. So I'd suggest figuring out...
09-08-22, 02:57 PM
Replies: 13
Views: 295
Posted By Antifriction

The 2019 model...

The 2019 model (https://feltbicycles.com/products/verza-speed-50-fitness-bike) had a 135mm rear hub, 7-sp freewheel. Switched to freehub 2020, same hub width. So upgrading should be straightforward,...
09-06-22, 02:56 PM
Replies: 18
Views: 417
Posted By Antifriction

&Korina: you could attach the horizontal arm of...

&Korina: you could attach the horizontal arm of the Mirrcycle to a clamp on the handlebar - leaving out the vertical post. You could also use the extension tube they sell as a vertical post:...
09-06-22, 02:15 PM
Replies: 18
Views: 417
Posted By Antifriction

genec: you might consider twisting the Mirrcycle...

genec: you might consider twisting the Mirrcycle out of harm's way before riding through dodgy openings. It's actually in the instructions: "SUGGESTION: When riding off road, on trails, or in the...
09-06-22, 02:00 PM
Replies: 18
Views: 417
Posted By Antifriction

@ work4bike: the Mirrcycle is mildly convex -...

@ work4bike: the Mirrcycle is mildly convex - images are about half the size of those in a flat mirror, meaning field of view is doubled. That seems like about the right compromise if you have to...
08-30-22, 09:58 PM
Replies: 18
Views: 417
Posted By Antifriction

Another drawback of the wide field of view is...

Another drawback of the wide field of view is that - as in the photo - it often includes the sun, as a blob of glare.
08-30-22, 04:56 PM
Replies: 18
Views: 417
Posted By Antifriction

It is showing the same car - the black one, next...

It is showing the same car - the black one, next to two white ones in the top mirror, is on the right in the bottom mirror.
08-30-22, 04:39 PM
Replies: 18
Views: 417
Posted By Antifriction

convex mirrors: Mirrycle field of view is just right

I got a cheap plastic mirror, and found that the curvature was so extreme that cars bearing down on me looked so tiny I had to concentrate to spot them. Online comments then persuaded me to try the...
08-27-22, 08:35 PM
Replies: 22
Views: 669
Posted By Antifriction

Something you might consider, either as a...

Something you might consider, either as a permanent solution or just to get riding for now, is to set up a 2x9 - then you don't need to reach the outer chainring position.

Also, if only using the...
Forum: Folding Bikes
08-09-22, 08:30 PM
Replies: 1,361
Views: 380,569
Posted By Antifriction

https://cimg0.ibsrv.net/gimg/bikeforums.net-vbulle...

https://cimg0.ibsrv.net/gimg/bikeforums.net-vbulletin/443x591/seymour_dam_gate_5542d71f06dc8e6ac9505f4569450cfb4a26e6f0.jpg
Born rebel.
Forum: Folding Bikes
08-07-22, 12:34 PM
Replies: 3
Views: 313
Posted By Antifriction

Regarding how precise FD profiles have to be, I...

Regarding how precise FD profiles have to be, I just cut right side of this FD cage to a 52t profile to fit over a chainguard I picked up, & it still works fine with 48t ring. Knocking the chain off...
Forum: Folding Bikes
08-02-22, 09:31 PM
Replies: 30
Views: 1,498
Posted By Antifriction

www.microshift.com/models/cs-h093-11-38t/ : it's...

www.microshift.com/models/cs-h093-11-38t/ : it's 11-13-15-18-21-24-28-32-38.
Forum: Folding Bikes
08-02-22, 11:18 AM
Replies: 4
Views: 298
Posted By Antifriction

Actually you can squeeze on 8 or 9 cogs on a...

Actually you can squeeze on 8 or 9 cogs on a 7-speed hub without metalwork, by using 9- or 10-speed parts (spacers, shifter & chain) with 1 less cog than intended:...
Forum: Folding Bikes
08-01-22, 02:45 PM
Replies: 30
Views: 1,498
Posted By Antifriction

Listed capacity is 27t:...

Listed capacity is 27t: https://www.microshift.com/models/rd-m6195s/
Forum: Folding Bikes
07-19-22, 08:03 AM
Replies: 4
Views: 422
Posted By Antifriction

Just found this, in a 2016 review...

Just found this, in a 2016 review (https://www.chooseafoldingbike.com/dahon-speed-d7-bike-review/) of the Dahon Speed D7: "it has 11-30 Cassette instead of 14-28T freewheel that was used in its...
Forum: Folding Bikes
07-18-22, 10:46 PM
Replies: 3
Views: 268
Posted By Antifriction

Q1: no. Q2: yes. But... a 2-speed with a 109%...

Q1: no. Q2: yes. But... a 2-speed with a 109% gear range, effected with dual chainrings, seems like a weird way to migrate away from single-speed purity.
Forum: Folding Bikes
07-18-22, 10:11 AM
Replies: 4
Views: 422
Posted By Antifriction

Sheldon's 8-of-9-on-7 trick: new life for 7-speed folders?

The late, great Sheldon Brown pointed out a dead-simple way you can squeeze an extra sprocket or two onto 7-speed freehubs (https://www.sheldonbrown.com/k7.html#897) using newer parts: just buy a 9...
Forum: Folding Bikes
07-10-22, 01:09 AM
Replies: 7
Views: 555
Posted By Antifriction

I'm a Sheldon fan, but 88/21 is actually 419%....

I'm a Sheldon fan, but 88/21 is actually 419%....
Forum: Folding Bikes
07-09-22, 07:29 AM
Replies: 7
Views: 555
Posted By Antifriction

Gee, Reddleman - your gear numbers, so much lower...

Gee, Reddleman - your gear numbers, so much lower than the nominal-wheel-size approximation, startled me into measuring the weighted roll. Mine should be 7% lower.

I'm waiting to see if a 9-34t or...
Forum: Folding Bikes
07-07-22, 08:37 PM
Replies: 7
Views: 555
Posted By Antifriction

Folder with operatic range? Sing its praises here!

Tall gears and wide ranges are a challenge in tiny spaces. Rohloff, Schlumpf, and Nuvinci take it inside. Mobiky and Sinclair A-bike get special mention for 2-stage transmissions.
To lead things...
Forum: Folding Bikes
07-05-22, 11:23 AM
Replies: 3
Views: 313
Posted By Antifriction

https://cimg2.ibsrv.net/gimg/bikeforums.net-vbulle...

https://cimg2.ibsrv.net/gimg/bikeforums.net-vbulletin/606x431/hose_clamped_fd_front_f9d5134262f2b1b8d75afc2e3bc1a5942904426f.jpg
...
Forum: Folding Bikes
07-05-22, 02:50 AM
Replies: 3
Views: 313
Posted By Antifriction

front derailleur on old Dahon: get misfit clamp FD, cut clamp to stub, use hose clamp

Thought I'd mention this in case others are wondering if it's worth trying.

Folks have come up with a few ways to attach FDs to thicker-than-the-market-is-motivated-to-serve downtubes. Starting...
Forum: Folding Bikes
06-18-22, 01:12 PM
Replies: 20
Views: 668
Posted By Antifriction

Sheldon Brown is with you...

Sheldon Brown is with you (https://www.sheldonbrown.com/mega7/) on that, BobbyG: " At first glance, many people look at the sprocket numbers 11-13-15-18-21-24-34 and wonder what Shimano's engineers...
Forum: Folding Bikes
06-17-22, 06:04 PM
Replies: 20
Views: 668
Posted By Antifriction

A less involved option is a wide-range cassette....

A less involved option is a wide-range cassette. Reddleman has put Microshift Advent 9-speeds on 2 Terns (https://www.bikeforums.net/folding-bikes/1186750-tern-link-d8-s-not-got-range.html), one...
Forum: Folding Bikes
06-04-22, 02:28 PM
Replies: 33
Views: 1,255
Posted By Antifriction

Given that you're challenged by hills and have...

Given that you're challenged by hills and have joint issues, you're likely to want a low gear much lower than you'll find on factory folders. I don't know if your research has made you conversant...
Forum: Folding Bikes
05-17-22, 04:03 PM
Replies: 9
Views: 667
Posted By Antifriction

GTA & base2: as splithub mentions, efficiency...

GTA & base2: as splithub mentions, efficiency losses compound in a derailleur / IGH hybrid, and a front derailleur is also lighter and cheaper. Hard to see why a system which is heavier, more...
Forum: Folding Bikes
05-16-22, 01:25 PM
Replies: 9
Views: 667
Posted By Antifriction

suggestion: Origami 500% 2x9

There are at least a few of us who would like to see a production folder with a 500% gear range, and the recently-announced Microshift Super Short...
Forum: Folding Bikes
03-14-22, 06:23 PM
Replies: 1
Views: 339
Posted By Antifriction

I'm happy with a similar, even older Eco 3 I...

I'm happy with a similar, even older Eco 3 I found on Craigslist last yere, and Eco 6 eviews are good: Dahon Eco C6 Folding Bike - Brick Red (http://bikesrater.com/dahon-eco-c6-folding-bike-reviews/)...
02-24-22, 05:25 PM
Replies: 38
Views: 964
Posted By Antifriction

Folder brands - Dahon, Tern, Brompton - have...

Folder brands - Dahon, Tern, Brompton - have seatposts that can be lowered well below 30", and e-bike versions.
Forum: Folding Bikes
12-23-21, 02:14 PM
Replies: 7
Views: 758
Posted By Antifriction

Thanks for the feedback. It's that B-screw...

Thanks for the feedback. It's that B-screw adjustment I was wondering about; sounds like it will push the tensioner arm down a few mm that really can't be spared.
Forum: Folding Bikes
12-22-21, 10:14 PM
Replies: 7
Views: 758
Posted By Antifriction

I'll take a 48t, giving 20-87" - which puts the...

I'll take a 48t, giving 20-87" - which puts the 436% range lower than most would want, but then I'm 65, in a hilly city, and hoping to ride the folder up ski-hill switchbacks I used to climb on a...
Forum: Folding Bikes
12-22-21, 05:43 PM
Replies: 7
Views: 758
Posted By Antifriction

11-48t Advent X on a 20" folder?

Reddleman has been probing the limits of 1xN gear range on folders, starting with a Microshift Advent 9-speed 11-42 on a Tern, & then fitting another Tern with an Advent 11-46...
Forum: Folding Bikes
12-13-21, 01:14 PM
Replies: 11
Views: 2,941
Posted By Antifriction

I use a rear pannier on a Dahon, on a customized...

I use a rear pannier on a Dahon, on a customized Axiom Journey 2429 adjustable rack. The rack is designed for 24"-29" wheels, with telescoping struts. To fit 20" wheels, I pulled out the strut...
Forum: Folding Bikes
08-23-21, 02:38 PM
Replies: 8
Views: 1,649
Posted By Antifriction

Since you mention new hubs & drivetrain, you...

Since you mention new hubs & drivetrain, you might consider a wide-range 1x instead of front shifter. Microshift Advent 9-speed (11-46t) is a well-reviewed budget MTB drivetrain. It's offered on some...
Forum: Folding Bikes
08-23-21, 02:03 PM
Replies: 6
Views: 744
Posted By Antifriction

I don't think it's that easy - no holes on the...

I don't think it's that easy - no holes on the front of my Eco 3. It's a pretty old model - made 2009-11.
Forum: Folding Bikes
05-23-21, 10:58 AM
Replies: 13
Views: 1,885
Posted By Antifriction

Fentuz: the Advent X system includes a...

Fentuz: the Advent X system includes a derailleur, and it's medium-cage. I have a medium-cage Tourney on my 20" Dahon; 43t capacity - more than enough for the 37-tooth range of the Advent X - &...
Forum: Folding Bikes
05-18-21, 12:58 AM
Replies: 13
Views: 1,885
Posted By Antifriction

Optimum depends on budget (# of speeds) &...

Optimum depends on budget (# of speeds) & terrain. For life on the cheap in hilly Vancouver, I've given my 7-speed Dahon an 11-34t cassette which pushes the jumps to get 309% range, & a 42t...
04-29-21, 02:34 PM
Replies: 9
Views: 750
Posted By Antifriction

That 22,30 / 11-34 setup has the same range as a...

That 22,30 / 11-34 setup has the same range as a 30 / 11-46 1x10, to within 1%. So, if your son goes for a few rides, stopping to finger-shift at the front when necessary, he'll be oriented to what...
06-27-12, 07:24 PM
Replies: 34
Views: 16,151
Posted By Antifriction

SkOtt: yes, though it would tend to grind, if not...

SkOtt: yes, though it would tend to grind, if not fixed to one part & kept clear of the other.

Larcal - I just survived the implosion of my carotid artery and a consequent stroke and have a...
Forum: Commuting
06-27-12, 06:23 PM
Replies: 29
Views: 5,727
Posted By Antifriction

Regarding the Zefals, at least in 2009/2010 they...

Regarding the Zefals, at least in 2009/2010 they could simply be unscrewed:
http://www.amazon.com/review/RMMB0HW3CWAHA
06-25-12, 07:31 AM
Replies: 34
Views: 16,151
Posted By Antifriction

A hospitalization, actually. The POG washer...

A hospitalization, actually.

The POG washer is supposed to deal with the Gator universal-wrench. Here's the Pinhead patent that includes it:...
06-14-12, 12:20 PM
Replies: 34
Views: 16,151
Posted By Antifriction

Larcal - good to hear the support - especially as...

Larcal - good to hear the support - especially as I'm just licking my wounds from a sally onto LFGSS.com. I joined, and PMed the owner; he re-opened that thread. Also PMed a user & proponent of the...
06-11-12, 03:31 PM
Replies: 34
Views: 16,151
Posted By Antifriction

Larcal - thanks for the link. LFGSS has for now...

Larcal - thanks for the link. LFGSS has for now made that thread private, by the way. So the stuff has hit the fan to some extent - British dealer has dropped the product.
11-09-11, 09:35 PM
Replies: 34
Views: 16,151
Posted By Antifriction

Thanks, folks. That sounds good, and steers me in...

Thanks, folks. That sounds good, and steers me in a new direction. Happily, the fix for the general vulnerability will cost very little as a retrofit, so there's no massive obsoleting of the...
11-09-11, 09:58 AM
Replies: 34
Views: 16,151
Posted By Antifriction

Methods beat locking skewers - publish or keep secret?

I got some Pinhead locking skewers, and was dismayed to be able to remove the rear one with vise-grips (lawyer lips on front dropouts made that one ungrippable).

So I ordered Pitlocks, and made a...
06-10-11, 10:02 PM
Replies: 3
Views: 1,158
Posted By Antifriction

Puzzled about skewer tension

I wanted to figure out if a Pitlock skewer would be OK for my horizontal rear dropout. (There are contradictory opinions: Pitlock says no, some folks here agree with that and some don't.) So I tried...
Showing results 1 to 50 of 63
 


 
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