I got one of the Monark repop springers and put it on my Nirve, looks pretty good I think. Although a close fit as the steerer tube was only 6 5/8" long. You need to carefully add up the stack height to make sure you can use it. In my case the steerer tube is about 5 1/4 inch tall had to use a set of headset reducers(~2-3 mm total height) to get the 1 1/8 head tube down to 1 inch to use the fork. Used an older Ritchey logic headset(~30.2 mm ccups) with stack height of ~38mm. The top plate is about .25 inch thick, I just made it, top not gets about 4-5 turns on it. Used a quill to aheadset adapter to use the stem I wanted.
Here's a pic;
That having been said, I was underwhelmed by the quality of the Monark repop springer fork after I began to mount it on the bike. I will probably end up removing it due to all the creaking due to fit issues as follows;
1) There is no press fit for the crown race(i.e. the steerer tube does not neck up to anything near the 26.4 mm crown race most 1-inch headsets require like schwinns), it fits sloppily on the steerer tube which is ~26.2 mm. Exchanged emails with the guys that makes them and I think he copied a Monark fork that had the crown race stuck, unaware of how the last 1/4 inch of the steerer should look.
2) Whatever jigs are used to make the 2 fork pieces have super loose alignment. The fork tabs were pointing in all different directions, the main fork is not square to the front tire and the front fork piece is not square to the rear fork. I've gradually bent things to be a little better, but to get the fork tubes in proper alignment may mess other things up like the finish.
3) The fork should have had washers or spacers on either side of the springs, I put some SS washers in and things worked generally better. Springs were eating at both the rubber above and the stud mounts below(which also have poor alignment).
4) If you intend to use it with a modern hub, the side plates need to be mounted on the outside of the fork and file out the mounting slot for a 3/8 axle. The fork mounting plate hardware is also poorly chosen IMHO.
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