BY-KLAASSEN BIKES

'By Klaassen' bikes, make-overs, custom

At our Brand store(s) - you will not only find our new high end Klaassen models - but also bikes we gave a second chance according our unique restyle & rebuilt concept, by boosting it visually and often technically (serviced and upgrades).


We use the same principles and vision as we use on our new Klaassen bikes. Resulting in a better looking and performing bike is the result, compared to what the original manufacturer once delivered ('Resto-modding'). We can do this with your own existing bike, or we look for a nice donor bike for your specific project. These By Klaassen projects can be followed on our separate make-over Instagram account > .

Pinarello Treviso - By Klaassen
02 Jan, 2024
A '91 Pinarello Treviso By Klaassen - in this dedicated different division of our company we give existing bikes the By Klaassen treatment. This Pinarello is fully rebuilt, restyled and slightly modified, with a new paintjob and a lovely mix of original and modern parts, giving a better than original result both style wise as ride wise.
74 Gazelle Champion Mondial By Klaassen
04 Oct, 2022
74 Gazelle Champion Mondial By Klaassen - a lovely riding machine, after a By Klaassen treatment from scratch.
Gazelle champion mondial randonneur by klaassen custom restomod
23 Aug, 2021
~1984 Gazelle Champion Mondial Randonneur (ST) By Klaassen edition RestoModding at its best for this almost 40 years old Gazelle Champion Mondial 'Supertoerder' (531 ST).
17 Aug, 2021
~1979. This customer wanted us to give this lovely donor the Klaassen magic. The Raleigh had a boring and lame look at first with his rack, city bike handlebar & brakes and saddle.
EDDY MERCKX GRAND PRIX BY KLAASSEN
16 Aug, 2021
Early 2000's EDDY MERCKX GRAND PRIX BY KLAASSEN RestoModding at its best for this almost 20 year old aluminium Eddy Merckx Grand Prix in XXL size.
26 Jun, 2021
90's KOGA MIYATA GENTSRACER BY KLAASSEN - A paintscheme & colour combination you won't see often, really cool with blue and purple transitions and those pink logo's. There was an extra touch and challenge here.. This bike was left for dead for 20 years. The bike was packed under a thick and sticky layer of dust and other stuff. ▶Goal: make this bike great again so that the original owner will start riding it again, as a special motivational surprise gift (stimulate health). The paint was/is actually in great condition, just some light patina (traces of use). ▶So, as it had a characterful colouring from it's own we saw 2 original Black items as the unifying highlight color for a better total package. So we wanted to use as much as possible black parts, combined with chrome details. To make the frame standout more. And get a better total visual impact. And we aimed for a 1kg+ weight loss. ▶WHAT WE DID: First, a thorough cleaning.. We found some nice Campagnolo Eurus wheels, with a Nice profile that matches the thin tubing of a steel frame. We removed the decals for that clean and right Klaassen look. We managed to score a nice black carbon Campagnolo compact crankset within the project budget. We kept the original black Koga seatpost and a black stem. Fitted a new BLACK compact style handlebar with better ergonomics. We went a bit further in the Italian tune up with the nice Pirelli P zero folding tires in a comfortable but fast 28mm. New black cables, original Black Koga saddle, classic style black handlebar tape. We serviced and lubed all rotating parts. So. We gave it more character AND performance. We gained 1,5 kg! And 3 extra gears with more modern shifting performance . ⏺️ Bottle cage ⏺️ Light and timeless Campagnolo Eurus wheelset ⏺️ Campagnolo Record /Centaur carbon titanium 10 speed mix. ⏺️ Pirelli P Zero tires ⏺️ Upgraded handlebar with that Klaassen style, with better, compact ergonomics and looks. We love the result, after all the time and energy we put in. To find the right parts. The effort to get that paintscheme popping again. Not to forget the ride experience! As targeted: it lost 1,5 kg (!) and gained more character & style. Customer bike (assignment), not for sale
26 Jun, 2020
Again a great bike with potential in our opinion. Why? In his days it was leading with a standard carbon fork. Especially as the frame is from aluminum, this makes the base very interesting and in a way comparable with nowadays road bikes. The tubing visually is still subtle (no freaky shapes), so all looks like a nice classic bike, but with very modern elements. The paint was/is in great condition, just some light patina (traces of use). Visually the total could be better, stronger. The devil is in the details. So we opted for focussing on the existing chrome accents. It used to be a mix of chrome and black but we brought it back to more chrome (look at that beautiful stem we found! ). For this older bike we wanted to emphasise the classic element of it. So, the bike has an oldskool look but due to the high end aluminum frame, the modern H+Son wheels and the oldskool Profile carbon fork this bike rides really modern. We could have gone for Campagnolo Vento or Shamal wheels, but opted for these as these are lighter, wider, handbuilt AND 11 speed ready, so easier for group upgrades in the future! Ofcourse we thoroughly cleaned the bike, serviced components, topped it off with new Brooks classic handlebar tape, our signature bottle cage and extra light inner tubes. We gave it a bit more character. Subtle but enough. -56 cm -Handbuilt neo classic wheelset, H+Son chrome, Miche hubs -Campagnolo Created for customer (assignment)
champion mondial gazelle custom
by freek klaassen 04 May, 2019
Reynolds tubing and a Klaassen 'Oldskool vs. Newskool - best of both worlds' touch.
koga by klaassen
by freek klaassen 04 May, 2019
Family piece given more attitude, using unique FIR red wheels with Dura-Ace hubs and the red accent in general, referring to the red KOGA decals.
koga exerciser custom bike
19 Mar, 2019
Koga Miyata with characterful paint scheme, we gave it a bit better total package regarding styling and performance as well.
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Gallery latest projects - through Instagram

@ByKlaassenbikes  -  #byklaassenbikes

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