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Old 08-28-13, 10:31 AM   #1
freebooter
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Second folder - Impulse 21

After a mix up involving a courier losing a bike for a while just a couple of weeks after getting my first folder http://www.bikeforums.net/showthread...older-Speed-TR I got my 2nd, an Impulse 21. Hardly used, the molding in the centre of the tyres not even worn off. Came with the Dahon suspension seatpost and Brookes B17 but it had my Turner seatpost and WTB saddle in when I took the photo.

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Old 08-28-13, 10:51 AM   #2
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well done.

it would interesting to know in what way a dahon impulse is not a dahon helios...

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Old 08-28-13, 11:31 AM   #3
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I am not an expert but I thought most Dahons of the time had a similar frame design but differed in materials and components. The Impulse is a steel frame whereas the Helios looks like alloy. The impulse also has the Dualdrive 3x7 rear hub and hence the rear triangle is 135mm spacing. I think the international version had a front dynamo hub but for some reason the UK importer specced a normal hub. Probably other component differences.

The impulse seems to have been the forerunner of the Speed tr.
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Old 09-11-17, 01:19 PM   #4
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Bumping old thread. I am looking at a Dahon Impulse for sale locally. Black or dark blue with white letters. NOS, looks totally un used but is early 2000 I think. Looks like a quill stem, and it is three speed, looks like Shimano IGH.

They are asking approx 110.

If I buy it it`ll be as a project bike, to build up a light folder, no rack or heavy components, just plastic Click Fix for light luggage, or the Andersen if I travel far.

I am thinking buildng a new wheel with a 28 spoke 5 speed SA hub and also a lighter front wheel. Kojack or similar light tyres.

I do not need another bike but have beeb\n thinking of a light one for some time.

Would you do it? Should be the same frame as the Helios. Anybody have knowledge or opinions?
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Old 09-12-17, 04:31 AM   #5
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Speed TR and Impulse were sold at the same time in the UK..I had one in 2007..Steel 4130 chromoly frame..Mainly sold in a bright red or black colour..with big apple tyres..
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Old 09-12-17, 02:55 PM   #6
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Quote:
Originally Posted by tudorowen1 View Post
Speed TR and Impulse were sold at the same time in the UK..I had one in 2007..Steel 4130 chromoly frame..Mainly sold in a bright red or black colour..with big apple tyres..
Is it worth spending time and money on? Would you buy one again? I read about same feel when riding it as the Speed Dahons.
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Old 09-12-17, 04:38 PM   #7
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Yes..worth spending money on..Has a fantastic gear range ..something like 24 ins to 115 inches..Big apple tyres make for a smooth ride..but slightly heavier than a Speed 8 because of the hub gears and cassette..
Would I buy one again..prefer just derailleur gears..
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Old 09-12-17, 05:03 PM   #8
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I just bought a Sachs dual drive wheel off Ebay. Arrived today. I have not yet decided what folder to put it on.

I`ll post again if I buy the bike.
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