# quickly removable seat pin / QRS modification DIY **URL:** \ **Category:** Tips and Techs\ **Created:** [April 6, 2011, 4:26pm UTC](https://www.stridaforum.com/t/quickly-removable-seat-pin-qrs-modification-diy/639 "2011-04-06T16:26:48Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![Blackstridaaustria](https://www.stridaforum.com/user_avatar/www.stridaforum.com/blackstridaaustria/32/12_2.png) [@Blackstridaaustria](https://www.stridaforum.com/u/Blackstridaaustria)\ **Post date:** [April 6, 2011, 4:26pm UTC](https://www.stridaforum.com/t/quickly-removable-seat-pin-qrs-modification-diy/639/1 "2011-04-06T16:26:48Z")
Hello Strida fans, this modification is intended for people, who want to share their (ST-QRS-001 equipped) Strida temporarily with another person of greatly different body height. A body height of 1,45 - 1,75m requires the lower position of the seat pin and a height of 1,75 - 1,93 m the higher position. The changing of the seat pin to another (upper or lower) position requires usually the un- and remounting of the saddle, the carrier and the complete “quick” release seat molding. 😒😕 A new designed seat pin (containing a magnet), together with a few simple mods on the seat molding solve the problem… 😃 The material costs are below 1 €, most expensive part is the magnet (0,22 €/each). Weight of magnet 0,32 g, magnetic force 350 g (~50 x weight of the seat pin), from here: [http://www.supermagnete.de/eng/S-03-06-N](http://www.supermagnete.de/eng/S-03-06-N) The pins: ![](https://www.stridaforum.com/uploads/default/original/2X/b/bf1f8a6036f69995b2eff1b0d4ef9ff1c2fe1d26.jpeg) ![](https://www.stridaforum.com/uploads/default/original/2X/6/66ca5f0792b9ef1921a55f88813eec949b238c33.jpeg) Required mod on the seat molding (wood drill, low rpm): ![](https://www.stridaforum.com/uploads/default/original/2X/4/44782f77fbe62e97740bd8e091216cbc7d49938f.jpeg) ![](https://www.stridaforum.com/uploads/default/original/2X/1/1462ae04bb60d929212ee814d4794e9dd275836e.jpeg) Required mod on the QR locking mount (metal drills in 1 mm steps, mid rpm): ![](https://www.stridaforum.com/uploads/default/original/2X/e/ea20558bd0da621a21e81ee737e50d00074341fd.jpeg) Function of the helping “tool” (plastic roll): ![](https://www.stridaforum.com/uploads/default/original/2X/c/c1e63a8eb6b072f84fbcae7028857e8e85548288.jpeg) The “tool” and the small parts: ![](https://www.stridaforum.com/uploads/default/original/2X/e/e3fcaff4dbcb224a0b329e48f2a1280d0c65fd9f.jpeg) Design drawing, material: free cutting steel - every lathe operator will know what’s that 😉 ![](https://www.stridaforum.com/uploads/default/original/2X/b/b2e12ba2d9b5810ca44b04613030df28a7d46857.jpeg) Strongly recommended: The use of anti-seizing compound and torque allen screw driver. ![](https://www.stridaforum.com/uploads/default/original/2X/3/39d6f9a2ebfb33ae358fd09d4949e85454dfda32.jpeg) [http://www.neverseezproducts.com/bostik.htm](http://www.neverseezproducts.com/bostik.htm) [http://www.wera.de/](http://www.wera.de/) Function video (44 sec. 2,6Mb): [http://s769.photobucket.com/albums/xx331/Blackstridaaustria/QRS%20mod/?action=view¤t=MOV02344\_002-1.mp4](http://s769.photobucket.com/albums/xx331/Blackstridaaustria/QRS%20mod/?action=view¤t=MOV02344_002-1.mp4) ![](https://www.stridaforum.com/uploads/default/original/2X/4/42fe3043f686a2a82350680edaf75a6d9eae7c44.jpeg) More info about this topic to be found here: > [@Quick Release Seat Molding ST-QRS-001](https://www.stridaforum.com/t/quick-release-seat-molding-st-qrs-001/534/1): > > Dear Users, the Strida quick release saddle adjustment system is available as a spare-part in Europe by now. Thanks to fwd-bwd for posting information about this part here: [url][Strida 2010 tidbits - #7 by fwd-bwd](https://www.stridaforum.com/t/strida-2010-tidbits/402/7)] For 49 € you will get this: [image] [image] [image] here are better pics + a scan of the manual: [http://s769.photobucket.com/albums/xx331/Blackstridaaustria/Strida%20QRS/](http://s769.photobucket.com/albums/xx331/Blackstridaaustria/Strida%20QRS/) Mounting this seat molding is very easy, step-by-step pics are included in the manual. Owning two Strid… > [@Ming Cycle's reply to ST-QRS-001/saddle bolt request](https://www.stridaforum.com/t/ming-cycles-reply-to-st-qrs-001-saddle-bolt-request/573/1): > > Dear forum members, on 06.11.2010 I sent a request with two technical questions mentioning the Strida Quick Release Seat Molding and the Strida saddle bolt/nut to [mingbike@ms9.hinet.net](mailto:mingbike@ms9.hinet.net) As there was no reaction till 16.11.2010, I sent the message to [info@vanmoof.com](mailto:info@vanmoof.com) , who kindly forwarded it to Ming Cycle. Thanks to VANMOOF/The Netherlands! Here is the message: Here the attached pictures: QRSmod 01.jpg [image] QRSmod 02.jpg [image] QRSmod 03.jpg [image] On 18.11.2010 [strida-global@st…](mailto:strida-global@strida.com) Please note: There are no spare parts for the QRS system available. Damaging one part means you have to buy a complete new QRS set! More tricks gladly by request… …better pics are here: [http://s769.photobucket.com/albums/xx331/Blackstridaaustria/Strida%20QRS%20quickly%20removable%20seat%20pin%201024/](http://s769.photobucket.com/albums/xx331/Blackstridaaustria/Strida%20QRS%20quickly%20removable%20seat%20pin%201024/) W. r. ---
**Author:** ![Amuro\_Lee](https://www.stridaforum.com/user_avatar/www.stridaforum.com/amuro_lee/32/4_2.png) [@Amuro\_Lee](https://www.stridaforum.com/u/Amuro_Lee)\ **Post date:** [April 6, 2011, 5:48pm UTC](https://www.stridaforum.com/t/quickly-removable-seat-pin-qrs-modification-diy/639/2 "2011-04-06T17:48:24Z")
Wow! It’s a great invention. 🕶 ---
**Author:** ![Tom](https://www.stridaforum.com/user_avatar/www.stridaforum.com/tom/32/17_2.png) [@Tom](https://www.stridaforum.com/u/Tom)\ **Post date:** [April 7, 2011, 11:42am UTC](https://www.stridaforum.com/t/quickly-removable-seat-pin-qrs-modification-diy/639/3 "2011-04-07T11:42:20Z")
Impressive. ---
**Author:** ![fwd-bwd](https://www.stridaforum.com/letter_avatar_proxy/v4/letter/f/e5b9ba/32.png) [@fwd-bwd](https://www.stridaforum.com/u/fwd-bwd)\ **Post date:** [April 7, 2011, 2:26pm UTC](https://www.stridaforum.com/t/quickly-removable-seat-pin-qrs-modification-diy/639/4 "2011-04-07T14:26:21Z")
Great solution! Thanks for sharing. ---
**Author:** ![system](https://www.stridaforum.com/uploads/default/original/2X/9/9677fb06fc90204cc4e8d6a58413eceb2ade25dd.svg) [@system](https://www.stridaforum.com/u/system)\ **Post date:** [April 7, 2011, 2:29pm UTC](https://www.stridaforum.com/t/quickly-removable-seat-pin-qrs-modification-diy/639/5 "2011-04-07T14:29:59Z")
WoW that is an awesome piece of work - well done and thanks for Sharing. 😃 (Shame on Ming dor making such a stupid a limited height seat adjustment system in the 1st place !!! 😒 ) ---
**Author:** ![Blackstridaaustria](https://www.stridaforum.com/user_avatar/www.stridaforum.com/blackstridaaustria/32/12_2.png) [@Blackstridaaustria](https://www.stridaforum.com/u/Blackstridaaustria)\ **Post date:** [April 7, 2011, 10:14pm UTC](https://www.stridaforum.com/t/quickly-removable-seat-pin-qrs-modification-diy/639/6 "2011-04-07T22:14:49Z")
Many thanks to all of you! 😃 …new QRS raw material arrived yesterday from vanmoof… …on the way modding another real QUICK release system… …durability report(s) will follow… Beware of helmets 😈 ---
**Author:** ![Blackstridaaustria](https://www.stridaforum.com/user_avatar/www.stridaforum.com/blackstridaaustria/32/12_2.png) [@Blackstridaaustria](https://www.stridaforum.com/u/Blackstridaaustria)\ **Post date:** [August 6, 2012, 9:54am UTC](https://www.stridaforum.com/t/quickly-removable-seat-pin-qrs-modification-diy/639/7 "2012-08-06T09:54:45Z")
> [@](#): > > …durability report(s) will follow… There is not that much to say - it works fine since over a year on both Stridas - mostly. Sometimes, even equipped with the very strong magnet, it takes two or three attempts to pull the seat pin out. (The hole in the seat molding must be aligned accurately to the seat pin.) I’ve changed the pins maybe 50 times by now. Sadly, it is not possible to convert a constructional fault into an ingenious concept… Actually, I’m still thinking about a fully adjustable, foldable saddle mount solution, function like the fictive version shown below: ![](https://www.stridaforum.com/uploads/default/original/1X/1ff4718bff54351aeec51b01e5ab8464b3f6a046.jpeg) ![](https://www.stridaforum.com/uploads/default/original/2X/5/5f820ca1fe7d88fec4827ce2cc1da43e7d748bf2.jpeg) What do you think about that, might that be useful? ---
**Author:** ![Bietrume](https://www.stridaforum.com/user_avatar/www.stridaforum.com/bietrume/32/16_2.png) [@Bietrume](https://www.stridaforum.com/u/Bietrume)\ **Post date:** [August 6, 2012, 1:08pm UTC](https://www.stridaforum.com/t/quickly-removable-seat-pin-qrs-modification-diy/639/8 "2012-08-06T13:08:17Z")
Hi BSA, That would be for sure an interesting feature: I always have my Strida in the trunk of my car lying against the rear seat backs, and I always struggle because it interferes with the luggage cover. So a lower folded Strida is a must for me! ---
**Author:** ![system](https://www.stridaforum.com/uploads/default/original/2X/9/9677fb06fc90204cc4e8d6a58413eceb2ade25dd.svg) [@system](https://www.stridaforum.com/u/system)\ **Post date:** [December 13, 2012, 8:09pm UTC](https://www.stridaforum.com/t/quickly-removable-seat-pin-qrs-modification-diy/639/9 "2012-12-13T20:09:41Z")
Check out Mark Sanders solution - I guess Ming wanted to do their own thing. Maybe they had a million pins in stock ![:mrgreen:](https://www.stridaforum.com/uploads/default/original/1X/cc83e9b583138e48ff45f96609046b06d06c7f9d.gif "Mr. Green") [picasaweb.google.com/1053980757 … 7903858962](https://picasaweb.google.com/105398075724946531166/StridaArchivePIX#5819206107903858962) ---
**Author:** ![Blackstridaaustria](https://www.stridaforum.com/user_avatar/www.stridaforum.com/blackstridaaustria/32/12_2.png) [@Blackstridaaustria](https://www.stridaforum.com/u/Blackstridaaustria)\ **Post date:** [December 13, 2012, 9:32pm UTC](https://www.stridaforum.com/t/quickly-removable-seat-pin-qrs-modification-diy/639/10 "2012-12-13T21:32:26Z")
Hm, nice video…but is anybody able to explain the function of the non-painted groove in the tube? ❓ ---
**Author:** ![deepfraught](https://www.stridaforum.com/letter_avatar_proxy/v4/letter/d/b9bd4f/32.png) [@deepfraught](https://www.stridaforum.com/u/deepfraught)\ **Post date:** [January 1, 2013, 4:40am UTC](https://www.stridaforum.com/t/quickly-removable-seat-pin-qrs-modification-diy/639/11 "2013-01-01T04:40:14Z")
Thanks for the post and info. Mine will likely stay on the top, but of all my bikes this would be one I’d be most likely to share, so making it easier to share given the chance will remove one excuse for being selfish with my bikes. PS: What bull horn bar end grips are you using in those photos ---
**Author:** ![Blackstridaaustria](https://www.stridaforum.com/user_avatar/www.stridaforum.com/blackstridaaustria/32/12_2.png) [@Blackstridaaustria](https://www.stridaforum.com/u/Blackstridaaustria)\ **Post date:** [January 1, 2013, 11:19am UTC](https://www.stridaforum.com/t/quickly-removable-seat-pin-qrs-modification-diy/639/12 "2013-01-01T11:19:42Z")
I’m glad that you like the post 😃 > [@deepfraught](#): > > PS: What bull horn bar end grips are you using in those photos [Grips for bend stear kit](https://www.stridaforum.com/t/grips-for-bend-stear-kit/608/1) These are (older) versions of the Ergon GC2, the newer GP2 are looking slightly different: ![](https://www.stridaforum.com/uploads/default/original/2X/f/f6f9277e7d5054c232dc2383ee7c0b4bba7c2484.jpeg) [Ergon bike ergonomics](http://www.ergon-bike.com/us/en/home)