Are your bars straight? Are you sure?
For those haunted by the suspicion that their stem isn’t precisely centred over the tyre, Tune’s Spurtreu (Tracks True) may well be the answer. A precisely-machined aluminium fixture, the Spurtreu uses a laser (pointer) to cast a dot on the front tyre and allow for previously unheard-of alignment. Critical for optimum performance, the Spurtreu ensures that the stem and front tyre are pointed in exactly the same direction, calibrating steering and reducing asymmetric arm fatigue (even arm use can not be guaranteed on point-point or lap-style courses).
For such a specialised, high-precision, German-made tool, the €69 price and 199g weight are arguably quite reasonable. More at tune.de.
Can we get one for saddles too? Oh, and one for tyre/valve alignment?
(I’m not taking this seriously, am I?)
Bit of string almost but not quite long enough to go bar end to front of wheel to bar end. Attach to spare barend caps. Measure centre by putting said caps together and puli string taught. Mark.
Put bar end caps in bars (centre the bars in stem first). Throw string over wheel and turn wheel to pull strum taught.
Play with stem / wheel alignment until mark on string is central on tyre.
Clamp.
It’ll be pretty accurate, dishing and carcasses notwithstanding.
Blinking iphone on a train. Please excuse typos
string x distance = stretch = inaccurate.
if it were me and i had a dished wheel, id use this without a tyre. after all, its about the visual aspect isnt it, really? so as long as the bars are in line the front wheel all else is about how accurately the frame/wheels have been made – something most of us have no control over after the fact.
yes, i want one.
I use my Mk1 Eye Ball. For extra accuracy I find that slightly sticking my tongue out or making a “hmmm” noise works.