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Old 11-12-17, 07:11 PM   #1
nz6666
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Hardest rear suspension block for Brompton

Been riding my city bikes recent months. Did a 20 km ride on my Brompton yesterday and immediately felt putting more effort compared with my other bikes especially on the climb, it felt very slow while I was working very hard. I am using the firm version of the rear suspension already. What is the hardest rear block ? I prefer something has no suspension at all like a block of steel or something like that?
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Old 11-12-17, 08:03 PM   #2
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At this point, the best alternative to the firm Brompton block appears to be Kamoya's Jenny SUS, although it's heavier and a lot more expensive.

Kamoya | Product categories | DinoKiddo
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Old 11-12-17, 08:47 PM   #3
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What's your weight and bike model?
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Old 11-12-17, 09:19 PM   #4
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There is Joseph Kuosac extra firm block, sold by Bikegang, I think. For me, switching out the Brompton tires that came on the bike for Primo Comets made a big difference.
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Old 11-12-17, 10:48 PM   #5
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I've seen a few Ti suspension block floating around, in case that helps:

Titanium/Ti Rear Coil Spring/Suspension Shock /Shox & Damper For Brompton - Mad Hornets
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Old 11-12-17, 11:42 PM   #6
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Why don't you try out a big hose clamp around the rubber block, to harden it. This has been done on the Brompton forums. The clamp goes around the middle of the rubber unit, preventing it from bulging out there, substantially stiffening it.

Last edited by jur; 11-12-17 at 11:57 PM.
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Old 11-13-17, 07:28 AM   #7
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What's your weight and bike model?
I am 75 kg and it's a s model.
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Old 11-13-17, 07:52 AM   #8
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There is Joseph Kuosac extra firm block, sold by Bikegang, I think. For me, switching out the Brompton tires that came on the bike for Primo Comets made a big difference.
How firm is it?
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Old 11-13-17, 08:08 AM   #9
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How firm is it?
Very little flex Joseph Kuosac Suspension block super firm ? BRMADRID
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Old 11-13-17, 08:28 AM   #10
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Quote:
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I prefer something has no suspension at all like a block of steel or something like that?
Okay, you asked:

hardtail.jpg
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Old 11-13-17, 10:39 AM   #11
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Metal?

there seem to be some that look like they adapted valve springs out of car/truck engines.


I just gear down for hills , with a Swiss mountain drive 2 speed crankset,, it is like having a 50 - 20 t double crankset..

the BSR has a 2nd run through .. 6 speed gear range 17 ~ 77"..

http://www.schlumpf.ch/hp/schlumpf/f...riebe.engl.htm they have a Brompton ready version..






....

Last edited by fietsbob; 11-13-17 at 10:47 AM.
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Old 11-14-17, 07:44 PM   #12
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[QUOTE=tcs;19989484]Okay, you asked:

Awesome, I wish I had the craftsmanship and machineary.
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Old 11-14-17, 10:29 PM   #13
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Have you tried out the hose clamp? That will tell you info.
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Old 11-22-17, 02:36 AM   #14
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How firm is it?
This firm ...
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Old 11-24-17, 12:54 PM   #15
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Yes, since compression in length, increases the width of the Elastomer,

Logically as well as in fact, restricting the width increase will increase the stiffness, resistance.


& its cheap to try adding a Jubilee/hose clamp ..


...
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