The B5098 is a short B-road along the Wrexham bypass.
It starts on the B5605 (former A483) to the west of Rhostyllen and heads north, running parallel to the current route of the A483, the Wrexham western bypass.
Presently the road reaches a T-junction. It meets the B5097 here and TOTSOs right to go over the A483 before having to TOTSO left immediately afterwards. It then descends into the valley of the River Clywedog where the river is crossed at a narrow bridge at Bersham. There is another TOTSO left on the far side, with the road ahead being the B5099.
The B5098 continues north for another quarter-mile or so before curving round to the right to end on a T-junction on the A525 immediately to the east of a junction with the A483.
Obviously the B5098 existed for some years before the current route of the A483 was built on largely the same line; this required the B5098 to be rerouted at its junctions with the B5097 and A525 but it still follows essentially the same line. It is interesting that the road was not declassified when the A483 was built although the large number of brown signs on the road give one excuse why it was not.