What size laces do I need?
Visit our size guide for an in depth explanation
How do I make metal aglet laces fit in my Ultra Boost
Due to the rectangular shape of the Ultraboost eyelets, metal aglet laces will not fit outright and threading will require modification of the Ultraboost cage to open up the eyelets. The methods that many of our customers have used to safely perform these modifications are detailed below:
Using a 4.0mm drill bit and drilling through the eyelets to make them circular, ORUsing an Allen Key, screwdriver, skewer or similar to temporarily open up the eyelets before threading through the laces, OR uncrimping the metal aglets to reveal a plastic covering underneath which will then allow threading of the laces. Subsequently the metal aglet can be re-attached by sliding it back on and re-crimping using tweezers.